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Emerson EZH and EZHSO Series Pressure Reducing Regulators Instruction Manual

1. MAIN VALVE BODY SIZE STRUCTURAL DESIGN RATING MAIN VALVE BODY MATERIAL END CONNECTION STYLE NPS DN psig bar NPT or SWE 1500 103 CL150 RF 290 20 0 1 25 CL300 RF 750 51 7 CL600 RF or BWE 1500 103 NPT or SWE 1500 103 CL150 RF 290 20 0 2 50 CL300 RF 750 51 7 WCC Steel CL600 RF or BWE 1500 103 CL150 RF 290 20 0 3 80 CL300 RF 750 51 7 CL600 RF or BWE 1500 103 CL150 RF 290 20 0 4 100 CL300 RF 750 51 7 CL600 RF or BWE 1500 103 Table 2 Outlet Pressure Ranges eae OUTLET PRESSURE RANGE AC ACCURACY CLASS PILOT CONTROL SPRING INFORMATION psig bar EZH Series EZHSO Series Spring Color Part Number 14 5 to 26 1 00 to 1 8 Yellow M0255240X12 23 to 44 1 6 to 3 0 S n Green M0255230X12 41 to 80 2 8 to 5 5 dev 2 9 Blue M0255180X12 PRX 120 73 to 123 5 0 to 8 5 Black M0255220X12 PRX 125 116 to 210 8 0 to 14 5 Silver M0255210X12 203 to 334 14 0 to 23 0 1 2 5 Gold M0255200X12 319 to 435 22 0 to 30 0 Aluminum M0255860X12 PRX 120 AP PRX 125 AP 435 to 1160 30 0 to 80 0 196 2 596 Clear M0273790X12 Table 3 Spring to Open Overview PART NAME CONDITION CAUSE EFFECT SERIES REGULATOR REACTION MODE Decrease of supply EZHSO Open d aebys A Filter Blocked Debris or aromatics pressure gives Filter i Clogged present in the gas decrease of loading pressure EZH Close Pilot disk Pilot cannot Debris or aromatics Increase loading E
2. BODY SIZE BODY STYLE m DN BODY MATERIAL END CONNECTION STYLE Standard or Tapped Inlet Tapped Inlet and Tapped Outlet Pilot Supply NPT GE11518X012 J Cast Iron CL125 FF GE11528X012 14B5623X012 CL250 RF GE11580X012 14B5623X022 NPT GE11581X012 SWE GE11440x012 0000 s 1 25 CL150 RF GE11583X012 14B5623X032 CL300 RF GE11607X012 14B5623X042 WCC Steel CL600 RF GE11608X012 14B5623X052 SCH 40 BWE GE11610X012 SCH 80 BWE GE11611X012 PN 16 40 RF GE13625X012 NPT GE10583X012 Cast Iron CL125 FF GE10585X042 CL250 RF GE10587X012 NPT GE10588X012 SWE GE10682X012 2 50 CL150 RF GE10676X012 14B5834X032 CL300 RF GE10678X012 14B5834X042 WCC Steel CL600 RF GE10679X012 14B5834X052 SCH 40 BWE GE10680X012 SCH 80 BWE GE10681X012 PN 16 40 GE12898X012 CL125 FF GE10689X012 Cast Iron CL250 RF GE10698X012 CL150 RF GE10699X012 14B5835X032 3 80 CL300 RF GE10700X012 14B5835X042 CL600 RF GE10701X012 14B5835X052 WCC Steel SCH 40 BWE GE10702X012 SCH 80 BWE GE10703X012 PN 25 40 GE13594X012 J CL125 FF GE10707X012 Cast Iron CL250 RF GE10822X012 CL150 RF GE10835X012 14B5836X032 40 1000 CL300 RF GE10839X012 14B5836X042 WCC Steel CL600 RF GE10842X012 14B5836X052 SCH 40 BWE GE10843X012 SCH 80 BWE GE10844X042 1 Not available for Standard body 2 Not available for Tapped Inlet Pilot Supply body Table 5 EZH EZHSO Serie
3. TOP VIEW P N ei SYVE NE A X NS L IZ SX SEM IMPROVED TRAVEL INDICATOR DETAIL GE42373 D APPLY LUBRICANT L SEALANT S EZH and EZHSO Series 146 147 151 193 153 FOR NPS 1 DN 25 EZH SERIES VERSION ONLY 10 21 22 23 24 25 26 6 150 149 152 29 L2 28 HL2 27 30 154 34 HL2 L2 L2 L1 AN t Dea 15 16 17 18 19 20 I 13 14 o9 4 Tj 6 VERSION WITHOUT FOR NPS 1 DN 25 TRAVEL INDICATOR DETAIL EZH SERIES VERSION ONLY NPS 1 THROUGH 3 DN 25 THROUGH 80 L1 LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE L2 SILICONE BASED GREASE S1 ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS S2 ANAEROBIC METHACRYLATE SEALANT FOR THREADS 1 Lubricant and sealant must be selected such that they meet the temperature requirements Figure 9 EZHSO Series Main Valve Assembly FOR NPS 3 DN 80 EZH SERIES VERSION ONLY 29 EZH and EZHSO Series TRAVEL INDICATOR DETAIL L
4. TYPE PRX 120 AP NPS 1 THROUGH 3 DN 25 THROUGH 80 Figure 11 EZH Series Working Monitor Pilot Mounting Assembly EZH and EZHSO Series EZH SERIES NPS 4 DN 100 BACK CHECK VALVE TYPE PRX 120 AP BACK CHECK VALVE NPS 4 7 DN 100 Figure 11 EZH Series Working Monitor Pilot Mounting Assembly continued EZH and EZHSO Series L PORT TYPE PRX 120 EZH SERIES NPS 4 DN 100 TYPE PRX 120 AP NPS 4 7 DN 100 Figure 12 EZHSO Series Single Pilot Mounting Assembly 37 EZH and EZHSO Series mam 7 N SS e TYPE PRX 120 AP OR PRX 125 AP TYPE PRX 125 OR PRX 125 AP EEN C NON La 2 aa WEE c N X JJ M ET SI ME Figure 13 PRX Series Pilot Assemblies TYPE PRX 120 OR PRX 125 TYPE PRX 120 OR PRX 120 AP GO GO GO G0GO GO GO 2 9 BLEED PORT SUPPLY PORT LOADING PORT SENSING PORT S B L A R 38 Pre Piped Pilot Supply and Pilot Exhaust Working Monitor Pilot Configuration with tapped inlet and outlet body Key Description 47 48 49 50 51 52 53 54 55 Pipe Nipple 2 required Tube Elbow 5 required Steel Fittings with Stainless steel Tubing Stainless steel Fittings and Tubing External Tube Connector 2 required Steel Fittings with Stainless steel Tubing Stainless steel Fittings and Tubing Pipe Tee Pipe Cross Tubing 90 NPT Pipe Elbow Pipe
5. IMPROVED TRAVEL INDICATOR DETAIL Figure 7 EZH Series Travel Indicator Assembly EZH Series Travel Indicator Maintenance A new and improved travel indicator has been phased in during 2013 The new version improves the O ring stem seal to minimize leakage and extend service life The components of the legacy and new versions are not interchangeable If maintenance is performed on the new travel indicator it is recommended to replace the entire travel indicator assembly with the new version Part numbers for the assemblies are shown in the parts list Figure 7 shows the difference between the designs The spare parts kits will support either design Take care to use the correct O ring key 142A or 142B when performing maintenance see parts list for the appropriate part number 1 Remove plastic travel indicator cover key 138 2 Loosen travel indicator bushing key 140 and remove it by sliding it over the travel indicator stem key 139 3 Remove indicator fitting key 141 and inspect O ring key 143 Remove O ring key 142B and back up rings key 160 Replace and lubricate O ring if damaged Pull up on the travel indicator 20 stem key 139 to force the spring collet key 144 out of the diaphragm head groove Examine these parts and the stem for wear and replace if necessary Examine the retaining ring key 145 for wear and replace if necessary Insert the travel indicator stem key 139 and spring
6. 51 Pipe Cross 2 52 Tubing p Pre Piped Pilot Supply and Pilot Exhaust Single Pilot Configuration with tapped inlet and outlet body Key Description Part Number 47 Pipe Nipple 48 Tube Elbow 5 required Steel Fittings with Stainless steel Tubing Stainless steel Fittings and Tubing 49 External Tube Connector Steel Fittings with Stainless steel Tubing Stainless steel Fittings and Tubing 50 PipeTee 2 2 2 2 c O 51 Pipe Cross smc 52 Tubing 55 Internal Connector Steel Fittings with Stainless steel Tubing Stainless steel Fittings and Tubing Pre Piped Pilot Supply Working Monitor Pilot Configuration with standard body or tapped inlet body Key Description Part Number 47 Pipe Nipple 48 Tube Elbow Steel Fittings with Stainless steel Tubing Stainless steel Fittings and Tubing 49 External Tube Connector Steel Fittings with Stainless steel Tubing Stainless steel Fittings and Tubing 50 PipeTee 2 2 2 2 p 51 Pipe Cross 2 52 Tubing pp 54 Pipe Nipple GE01727_E EZH and EZHSO Series Figure 10 EZH Series Single Pilot Mounting Assembly EZH and EZHSO Series i ad E a NPS 4 7 DN 100 Figure 10 EZH Series Single Pilot Mounting Assembly continued EZH and EZHSO Series
7. Inspect the upper actuator casing key 11 O ring key 9 anti friction split rings key 8 and anti friction ring key 4 for damage or wear If damaged remove the O ring and split rings and replace with new parts Lightly lubricate the O ring and split rings Place the split rings in the body first then slide the O ring between the split rings Lubricate and reinstall the anti friction ring key 4 Remove hex nuts key 26 from the stud bolts key 24 Lift off the lower actuator casing key 5 Remove the hex socket cap screws key 33 and spring lock washers key 32 Lift off the disk holder assembly key 30 and disk retainer key 31 Slide the sleeve key 14 out of the lower actuator casing key 5 and slide the outlet plate key 19 off of the sleeve Check the sleeve for scratches burrs or other damage and replace if necessary Inspect the lower actuator casing key 5 O rings keys 9 and 62 anti friction split rings key 8 and anti friction ring key 4 for damage or wear If damaged remove the O ring and split rings and replace with new parts Lightly lubricate the O ring key 9 and split rings Place the split rings in the body first then slide the O ring key 9 between the split rings Lubricate and mount O ring key 62 outside of the lower actuator casing key 5 Slide the outlet plate key 19 onto the sleeve key 14 and slide the sleeve into the lower actuator casing key 5 Pl
8. remove the sleeve assembly key 14 Lift off the diaphragm plates system Remove O ring key 15 and replace as needed Inspect diaphragm key 20 for damage or wear remove screws key 16 lift off inlet plate key 18 to replace diaphragm and O ring key 17 Unscrew 8 screws key 77 to remove cap key 70 from the upper casing key 5 Align screw holes on the cap key 70 to the sleeve guide screws key 66 Remove sleeve guide key 61 utilizing cap key 70 to unscrew Inspect O rings key 9 key 64 and key 153 for damage or wear replace anti friction rings key 8 and O ring key 9 if necessary Unscrew 8 cap screws key 6 and remove crush washers key 67 Lift off lower casing key 5 Inspect O rings keys 7 and 63 or damage or wear replace them if necessary 5 Remove cage key 78 6 Remove seat ring key 2 Inspect seat ring 10 11 12 13 for damage or wear If damaged replace with new parts Remove O ring key 34 from body key 1 Inspect for damage or wear If damaged replace with new parts Lubricate O ring key 34 and replace into the body key 1 Place seat ring key 2 on top of O ring in body key 1 with curved side down and seat edge up Place cage key 78 on the top of seat ring key 2 Place lower casing key 5 on top of body Replace crush washers key 67 and tighten cap screws key 6 Screw sleeve guide into lower actuator casing key 5 utili
9. Body Sizes End Connection Styles and Pressure Ratings See Table 1 Maximum Inlet and Outlet Casing Pressures 1500 psig 103 bar Maximum Emergency Design Casing Pressure 1500 psig 103 bar Maximum Operating Differential Pressure Main Valve 1500 psid 103 bar d Pilot Between loading pressure in pilot and loading sense pressure 1233 psid 85 0 bar d Outlet Pressure Ranges See Table 2 Minimum Differential Pressures MAIN VALVE MINIMUM DIFFERENTIAL SERIES BODY SIZE For 90 Capacity For 100 Capacity NPS DN psid bar d psid bar d 1 25 15 2 1 1 15 7 1 1 2 50 12 0 0 83 13 8 0 95 EZH 3 80 10 6 0 73 12 8 0 88 4 100 15 8 1 1 16 4 1 1 1 25 2 50 EZHSO 55 3 8 55 3 8 3 80 4 100 Pressure Registration External Pilot Connections 1 4 NPT Temperature Capabilities Nitrile NBR Version 20 to 180 F 29 to 82 C Fluorocarbon FKM Version 0 to 180 F 18 to 82 C Polyurethane PU Version 22 to 180 F 30 to 82 C Options Pre piped Pilot Supply Travel Indicator Whisper Trim Cage NPS 2 to 4 DN 50 to 100 Sizes only 1 The pressure temperature limits in this Instructional Manual and any applicable standard or code limitation should not be exceeded 2 When using a Type SA 2 pilot supply filter regulator the differential pressure across the regulator must be a least 45 psid 3 1 bar d for optimum regulator performance 3 Types PRX a
10. Fluorocarbon FKM EZHSO Series Disk Parts Kits NPS 1 2 and 3 DN 25 50 and 80 include keys 29 30 34 62 and 154 NPS 4 DN 100 include keys 29 30 69 71 75 and 154 NPS 1 DN 25 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 2 DN 50 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 3 DN 80 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 4 DN 100 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM EZH Series Full Repair Kits NPS 1 2 and 3 DN 25 50 and 80 include keys 4 7 8 9 15 17 20 28 29 30 32 33 34 62 142B and 143 NPS 4 DN 100 include keys 8 9 15 17 20 29 30 32 33 34 63 64 67 69 71 75 142B and 143 NPS 1 DN 25 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 2 DN 50 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 3 DN 80 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 4 DN 100 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM EZHSO Series Full Repair Kits NPS 1 2 and 3 DN 25 50 and 80 include keys 4 7 8 9 15 17 20 28 29 30 34 62 142B 143 153 and 154 Recommended spare part 1 When retrofitting an EZH Series with pins with the new cage it is also necessary to order the Seat Ring Part Number REZH1X00N12 REZH1X00F 12 REZH1X00P12
11. For a working monitor installation Figure 6 adjust the setpoint of the upstream monitor pilot Type PRX 125 to the desired maximum pressure Adjust the upstream working pilot Type PRX 120 to the desired intermediate pressure setting Adjust the downstream pilot to a pressure setting slightly above the upstream monitor pilot pressure setting Adjust the upstream monitor pilot Type PRX 125 to its desired setpoint Establish final desired downstream pressure by adjusting the downstream working regulator pilot 5 After adjusting the PRX Series pilot s to the desired pressure setting s slowly open the downstream block valve wide open 6 Close the bypass valve if used For EZHSO Series 1 Make sure all block valves vent valves and control line valve s are closed 2 Back out the pilot adjusting screw s 3 Introduce upstream pressure by slowly opening inlet valve EZH and EZHSO Series Table 4 Torque Specifications TORQUE SPECIFICATIONS Body Size PART NAME NPS 1 DN 25 NPS 2 DN 50 NPS 3 DN 80 NPS 4 7 DN 100 ft lbs Nem ft lbs Nem ft lbs Nem ft lbs Nem Indicator Fitting or Plug key 141 10 to 30 14 to 41 10 to 30 14 to 41 10 to 30 14 to 41 10 to 30 14 to 41 Stud Nuts key 26 45 to 50 61 to 68 45 to 50 61 to 68 80 to 95 108 to 129 Socket Head Cap Screws key 16 50 to 70 5 6 to 7 9 50 to 70 6 to 7 9 50 to 700 6 2 to 7 9 100 t
12. NPS 2 DN 50 Standard Whisper Trim Cage NPS 3 DN 80 Standard Whisper Trim Cage Anti Friction Ring 2 required NPS 1 2 and 3 DN 25 50 and 80 Bodies only Actuator Lower Casing NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Cap Screws NPS 1 DN 25 Body 4 required NPS 2 DN 50 Body 8 required NPS 3 DN 80 Body 8 required NPS 4 DN 100 Body 8 required O ring NPS 1 2 and 3 DN 25 50 and 80 Bodies NPS 4 DN 100 Body Anti Friction Rings 4 required O ring 2 required NPS 1 DN 25 NPS 2 DN 50 NPS 3 DN 80 NPS 4 DN 100 EZH Series Part Number REZHS1X0N22 REZHS1X0F22 REZHS1X0P22 REZHS2X0N22 REZHS2X0F22 REZHS2X0P22 REZHS3X0N22 REZHS3X0F22 REZHS3X0P22 REZHS4X0N22 REZHS4X0F22 See the following Table ERAA04303A0 ERAA06540A0 ERAA06541A0 ERAA06542A0 ERAA04296A0 ERAA06553A0 ERAA06576A0 ERAA06577A0 M0297320X12 M0300960X12 M0300930X12 M0300730X12 M0303250X12 M0303430X12 M0303420X12 M0303410X12 ERAA00273A0 ERAA00274A0 ERAA00275A0 ERAA00276A0 GE31405X012 GE37679X012 GE37959X012 GE38018X012 GE38021X012 M0274090X12 M0296970X12 M0295830X12 GE44397X012 M0300770X12 M4691008X12 GE11386X012 GE11387X012 M4691020X12 19B2838X012 M6020169X12 M0194530X12 M6020019X12 M6020029X12 M6020036X12 M6020044X12 23 EZH and EZHSO Series Key 1 EZH and EZHSO Series Main Valve Body Part Numbers
13. O ring O ring Socket Head Set Screw NPS 4 DN 100 Body Only 8 required Crush Washer NPS 4 DN 100 Body Only 8 required Special Screw NPS 4 DN 100 Body Only 8 required O ring Cap NPS 4 DN 100 Body EZH Series Cap NPS 4 DN 100 Body EZHSO Series Cap O ring Locking Nut EZH Series NPS 4 DN 100 Body only Upper Spring Seat EZH Series only NPS 4 DN 100 Body only Hex Socket Cap Screw NPS 4 DN 100 Body only O ring Screw NPS 4 DN 100 Body only 8 required Cage NPS 4 DN 100 Body only Standard Whisper Trim Cage Lower Spring Seat EZH Series only NPS 4 DN 100 Body only Ball Bearing 2 required NPS 4 DN 100 Body only Part Number M0220960X12 M0278570X12 M5095001X12 M5095001X12 M0297680X12 M0303680X12 GE07221X012 GE00606X012 ERCA01574A0 24B1301X012 24B1301X012 24B1301X012 T13659T0102 T13659T0072 T13659T0102 M0300360X12 See Parts Kits M6020172X12 M6020139X12 M5021047X12 M4501738X12 M0300040X12 M6020149X12 M0299980X12 GE44707X012 M6020175X12 M0300060X12 M0300070X12 M5011135X12 M6020117X12 M5009048X12 M0303260X12 M0303520X12 M0300080X12 M4500574X12 31 EZH and EZHSO Series Key Description 138 Travel Indicator Cover NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body 139 Travel Indicator Stem NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body 140 Indicator Bushing 141 Travel Indicator Fitt
14. already on the sleeve to fix the diaphragm plates system on the sleeve system See Torque Specifications Table 4 for proper torque values Tighten screws key 68 using a star criss cross pattern for five times until proper specified torque is achieved Lubricate lower casing key 5 on the diaphragm contact area Carefully insert the trim system into the sleeve guide key 61 utilizing the eye bolts key 35 that fits in the upper spring seat key 73 threaded hole 16 17 18 19 20 21 22 Lubricate the diaphragm key 20 on the upper casing contact area Lubricate and mount the O ring key 69 on the cap key 70 Lubricate and mount O rings key 9 and anti friction rings key 8 inside the cap Unscrew the eyebolts key 35 from the upper spring seat key 73 and carefully place the cap on the upper actuator casing key 11 Align the travel indicator hole on the cap to the upper actuator casing travel indicator hole Lubricate cap screws key 77 and attach cap key 70 to the upper casing key 5 using cap screws key 77 Bag diaphragm flat to lower actuator casing diaphragm flange contact area Carefully place the upper actuator casing on the top of the lower actuator casing trim system using a stud to guide Note Rotate the upper casing such that the outer holes for sensing lines are perpendicular to gas flow and outer holes of lower casing Lubricate threads on bolts key 21 Bolt together
15. sleeve adaptor key 27 Insert the hex socket cap screw key 154 and tighten See Torque Specifications Table 4 for proper torque values Carefully lift the upper actuator casing and lower actuator casing assembly keys 11 and 5 and place on the body key 1 Secure with stud bolts and nuts keys 24 and 26 See Torque Specifications Table 4 for proper torque values NPS 4 DN 100 Disk Maintenance EZH Series Only Refer to Figure 8 1 2 Remove cap screws key 77 Carefully lift the cap key 70 off of the upper actuator casing key 11 and unscrew the eyebolts key 35 from the cap key 70 Remove O ring key 75 Inspect the O ring for damage or wear and replace if necessary Remove the O ring key 69 Inspect the O ring for damage or wear and replace if necessary Lubricate O ring before placing inside the cap key 70 10 11 12 13 14 15 16 17 18 19 20 Remove special screws key 68 from sleeve key 14 Fit eyebolt key 35 into the upper spring seat key 73 threaded hole Carefully remove the trim system from the sleeve guide key 61 using the eyebolts key 35 Remove socket head cap screws key 33 and lock washers key 32 Lift off the disk retainer key 31 and disk holder assembly key 30 Remove the O ring key 29 Inspect the O ring for damage or wear and replace if necessary Lightly lubricate O ring be
16. system See Torque Specifications Table 4 for proper torque values Place O ring key 69 on the cap key 70 Carefully place the cap key 70 on the upper actuator casing key 11 Lubricate the cap screws key 77 before screwing in to hold the cap key 70 and the upper EZH and EZHSO Series actuator casing key 11 together See Torque Specifications Table 4 for proper torque values Note Rotate the cap such that the outer holes for sensing lines are in line with upper casing holes for sensing lines to validate the alignment and before attaching cap check that travel indicator is aligned on the cap and on the upper casing 18 Mount O ring key 75 on the cap NPS 1 through 3 DN 25 through 80 Intermediate Flange O ring Maintenance for EZH and EZHSO Series 1 2 Remove nuts key 26 Carefully lift the upper actuator casing and lower actuator casing assemblies keys 11 and 5 off the body key 1 Remove cap screws key 6 Lift off intermediate flange key 25 Remove O ring key 7 Inspect the O ring for damage or wear and replace if necessary Lightly lubricate O ring before placing in the body key 1 Place the intermediate flange key 25 on the body make sure to position the stud bolt key 24 holes on the outsides of the body key 1 Secure with cap screws key 6 See Torque Specifications Table 4 for proper torque values Carefully lift the upper actuator casing and lowe
17. 151 and install protective cap key 146 Place travel indicator assembly keys 138 139 140 141 142A or 142B 143 144 145 160 and 192 in the upper actuator casing key 11 if present and tighten the travel indicator fitting key 141 NPS 4 DN 100 Actuator Assembly Maintenance EZH Series Only Refer to Figure 8 1 If present remove the travel indicator assembly by unscrewing the travel indicator fitting key 141 then pull out the stem key 139 Please see the Travel Indicator Maintenance section for the proper maintenance procedure Remove hex head cap screws key 21 washers key 22 and hex nuts key 23 Carefully lift the upper actuator casing key 11 off the lower actuator casing key 5 Inspect the upper actuator casing key 11 O rings key 9 and anti friction rings key 8 for damage or wear If damaged remove and replace with new parts Place the anti friction rings in the body first then slide the O ring between the anti friction rings Unscrew 8 special screws key 68 Unscrew eyebolts key 35 from the cap and unscrew 8 screws key 77 to remove cap key 70 from the upper actuator casing key 5 Attach eyebolts EZH and EZHSO Series to the upper spring seat key 73 and lift up and remove the sleeve assembly key 14 Lift off the diaphragm plates system Remove O ring key 15 and replace it as needed Inspect diaphragm for damage or wear remove screws key 16 lift off in
18. 287 Asia Pacific Shanghai 201206 China Tel 86 21 2892 9499 The Emerson logo is a trademark and service mark of Emerson Electric Co All other marks are the property of their prospective owners Fisher is a mark owned by Fisher Controls International LLC a business of Emerson Process Management The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability We reserve the right to modify or improve the designs or specifications of such products at any time without notice Emerson Process Management Regulator Technologies Inc does not assume responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any Emerson Process Management Regulator Technologies Inc product remains solely with the purchaser Emerson Process Management Regulator Technologies Inc 2003 2015 All Rights Reserved gt EMERSON
19. 3 DN 25 THROUGH 80 GD89918_H APPLY LUBRICANT L SEALANT S L1 LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE L2 SILICONE BASED GREASE S1 ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS S2 ANAEROBIC METHACRYLATE SEALANT FOR THREADS Lubricant and sealant must be selected such that they meet the temperature requirements Figure 8 EZH Series Main Valve Assembly 25 EZH and EZHSO Series CO To UD OILD ER ae GD89918 J NPS 1 THROUGH 3 DN 25 THROUGH 80 Figure 8 EZH Series Main Valve Assembly continued Key Description Part Number Key Description 9 O rring 2 required continued 14 Sleeve continued EZHSO Series EZH Series continued Nitrile NBR and Fluorocarbon FKM ERAA00262A0 NPS 3 DN 80 Body A Fluorocarbon FKM M6020044X12 AERA ON 100 Body 11 Actuator Upper Casing NPS 2 DN 50 Body NPS 1 DN 25 Body M0297220X12 NPS 3 DN 80 Body NPS 2 DN 50 Body M0296950X12 NPS 4 DN 100 Body NPS 3 DN 80 Body GE44420X012 15 O ring NPS 4 DN 100 Body M0300760X12 16 Socket Head Cap Screw 13 ase NPS 1 DN 25 Body 6 required NPS 1 DN 25 Body M0194590X12 NPS 3 DN 80 Body 12 required NPS 2 DN 50 Body M0191440X12 NPS 4 DN 100 Body 8 required NPS 3 DN 80 Body M0192240X12 NPS 4 DN 100 Body M0300740X12 17 O ring EZHSO Series 18 Inlet Plate NPS 1 DN 25 Body GE41510X012 NPS 1 DN 25 Body NPS 2 DN 50 Body GE41082X012 NPS 2 DN 50 Body NPS 3 DN
20. Figure 13 loosen locknut key 2 and turn the adjusting screw into the spring case to increase or out of the spring case to decrease the downstream pressure When the required downstream pressure is maintained for several minutes tighten the locknut to lock the adjusting screw in position PRX Series Pilot Restrictor and Damper Screw Adjustment Note Recommended initial setting of the restrictor screw is turned completely in clockwise and then turned out 1 turn The damper screw initial setting is turned completely out counterclockwise The Type PRX 125 upstream monitor pilot in working monitor installations does not have a restrictor screw The Damper and Restrictor screws on the PRX Series pilot control the regulator s proportional band droop and speed of response For additional tuning follow the steps outlined below refer to Figure 13 1 Start with the restrictor screw R 1 turn counterclockwise from fully seated turn restrictor fully clockwise then 1 turn counterclockwise and the damper screw D fully counterclockwise 2 Turn damper screw clockwise until desired performance is achieved This reduces the flow path of the damper If the damper becomes fully seated no longer able to turn clockwise and the desired performance has not been achieved return the damper screw to the fully counterclockwise position The damper screw should not be left in the fully seated position as it will lock the regul
21. collet key 144 back into the diaphragm head groove Replace the indicator fitting key 141 and O ring key 143 and tighten with a referenced torque of 3 7 ft lbs 5 0 Nem Lubricate the O ring key 142B and back up rings key 160 2 required Place one back up ring on the stem key 139 followed by the O ring and then the other back up ring Push into groove of the indicator fitting key 141 Slide the travel indicator bushing key 140 over the travel indicator stem key 139 and tighten firmly in place Replace the travel indicator cover key 138 and tighten firmly in place PRX Series Maintenance Always remove spring key 7 tension before performing maintenance on this unit To remove spring tension loosen locknut key 2 and back out adjusting screw key 1 until compression is removed from the spring Lower Diaphragm Maintenance Disconnect pilot and remove it from the line Remove machine screws key 10 from lower cover key 21 and the separate lower cover from the body key 16 Use a wrench to hold the stem key 23 and break loose the stem nut key 20 Remove the stem nut and washer key 11 Remove the upper diaphragm plate key 13 diaphragm key 14 pad holder key 22 and O ring key 18 Inspect parts for damage or wear replace if necessary Remove orifice key 19 and O ring key 17 Inspect the parts for damage or wear and replace if necessary Lightly lub
22. from exceeding those limits Also be sure the installation is in compliance with all applicable codes and regulations Additionally physical damage to the regulator could break the pilot off the main valve causing personal injury and property damage due to bursting of pressure containing parts To avoid such injury and damage install the regulator in a safe location All Installations An EZH or EZHSO Series regulator bleeds no gas to atmosphere during normal operation thus making the regulator suitable for installation in pits and other enclosed locations without elaborate venting systems This regulator also can be installed in pits subject to flooding by venting the pilot spring case above the expected flood level so that the pilot setting can be referenced to atmospheric pressure 1 Only personnel qualified through training and experience should install operate and maintain a regulator Before installation make sure that there is no damage to or debris in the regulator Also make sure that all tubing and piping are clean and unobstructed Eyebolts are installed to aid in the handling and installation of the Regulator Assembly only Do not attempt to lift more weight than the regulator with these eyebolts 2 Install the regulator so that the flow arrow on the main valve matches the flow direction of process fluid through the regulator 3 Apply pipe compound to the external pipeline threads before installi
23. of the system The monitoring regulator s working pilot controls the intermediate pressure and the monitoring pilot senses the system s outlet pressure If the working regulator fails the monitoring pilot will sense the increase in outlet pressure and take control EZH and EZHSO Series TYPE TYPE PRX 120 PRX 125 TYPE TYPE PRX 120 E V _ SA2 z zm Ex Ej Ss S z R S v B B Him s 3 L l A A dB R EN Ff cM SE TYPE E SAI2 CHECK CHECK VALVE E VALVE L H z i e cp LY Gi d EZH SERIES EZH SERIES HEN MONITOR REGULATOR WORKER REGULATOR E INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE TYPE PRX EZ LOADING PRESSURE S BLEED PORT TYPE SA 2 B SUPPLY PORT V SENSING PORT M INTERMEDIATE PRESSURE L LOADING PORT R PILOT SUPPLY PORT NN PILOT SUPPLY PRESSURE A SENSING PORT M INLET PORT Figure 6 Working Monitoring System Operational Schematics ANE Nan e Adjustment Personal injury or equipment damage due to bursting of pressure containing parts may result if this regulator is overpressured or is installed where service conditions could exceed the regulator and pilot pressure ratings The working regulator must be rated for the maximum allowable operating pressure of the system because
24. step on the seat ring 7 Place the disk holder assembly key 30 and disk retainer key 31 on the sleeve adaptor key 27 8 Insert the lock washers key 32 and hex socket cap screws key 33 and tighten See Torque Specifications Table 4 for proper torque values EZH and EZHSO Series 9 Carefully lift the upper actuator casing and lower actuator casing assembly keys 11 and 5 and place on the body key 1 Secure with stud bolts and nuts keys 24 and 26 See Torque Specifications Table 4 for proper torque values For EZHSO Series Remove nuts key 26 Carefully lift the upper actuator casing and lower actuator casing assembly keys 11 and 5 off the body key 1 Remove the hex socket cap screw key 154 Lift off the disk holder assembly key 30 Do not attempt to remove the sleeve adaptor key 27 Remove the O ring key 29 Inspect the O ring for damage or wear and replace if necessary Lightly lubricate O ring before placing in the sleeve adaptor key 27 Remove the cage key 3 seat ring key 2 and O ring key 34 Inspect the O ring for damage or wear and replace if necessary Lightly lubricate O ring before placing in the body key 1 Set the seat ring key 2 back in the body key 1 with the curved side down and the seat edge up Place the cage key 3 on top of seat ring The cage will engage the step on the seat ring Place the disk holder assembly key 30 on the
25. the upper and lower actuator casings keys 11 and 5 using cap screws key 21 washers key 22 and hex nuts key 23 See Torque Specifications Table 4 for proper torque values Tighten cap screws using a star criss cross pattern for five times until proper specified torque is achieved Mount O ring key 75 on the cap key 70 Screw the eyebolts key 35 on the cap key 70 If present set the stem key 139 through the casing hole and tap it into the groove in the diaphragm plate key 18 Slide the travel indicator fitting key 141 over the stem and tighten to the cap key 70 NPS 4 DN 100 Actuator Assembly Maintenance EZHSO Series Only Refer to Figure 9 1 Remove closing cap key 146 unscrew 2 nuts key 151 If present remove travel indicator assembly by unscrewing the travel indicator fitting key 141 then pull out the stem key 139 Please see the Travel Indicator Maintenance section for the proper maintenance procedure Remove hex head cap screws key 21 washers key 22 and hex nuts key 23 Carefully lift the upper actuator casing key 11 off the lower actuator casing key 5 Inspect the upper actuator casing key 11 O rings key 158 and anti friction rings key 157 for damage or wear If damaged remove and replace with new parts Place the anti friction rings in the cap first then slide the O ring between the anti friction rings Unscrew 8 special screws key 68 Lift up and
26. this will be its inlet pressure if the monitoring regulator fails Also the outlet pressure rating of the monitoring pilot and any other components that are exposed to the intermediate pressure must be rated for full inlet pressure Working monitor installations require an EZH or EZHSO Series main valve with a Type PRX 120 or PRX 120 AP working pilot and a Type PRX 125 or PRX 125 AP monitoring pilot for the upstream regulator and an EZH or EZHSO Series with the appropriate Type PRX 120 or PRX 120 AP pilot for the downstream regulator Adjusting the monitor regulator Figure 6 is the same as adjusting the main regulator Monitor setpoints are set slightly higher than the main regulator The monitor pressure setting should be adjusted so it is at minimum two times the pilot accuracy band pressure above the working regulator pressure setting For the adjustment of the monitor regulator s two pilots please refer to the section on Startup and Adjustment on page 10 Installation Personal injury or equipment damage due to bursting of pressure containing parts may result if this regulator is overpressured or is installed where service conditions could exceed the limits given in the Specification section and on the appropriate nameplate or where conditions exceed any rating of the adjacent piping or piping connections To avoid such injury or damage provide pressure relieving or pressure limiting devices to prevent service conditions
27. with pressure coming from pre regulator Type SA 2 which reduces inlet pressure to the constant value of outlet pressure plus approximately 45 psi 3 1 bar This pressure opposes the main spring force that tends to open the regulator Outlet or downstream pressure opposes the pilot control spring When outlet pressure drops below the setting of the pilot control spring pilot control spring force on the pilot diaphragm opens the pilot valve disk providing additional loading pressure to the regulator actuator diaphragm This diaphragm loading pressure opens the main valve disk supplying the required flow to the downstream system Any excess loading pressure on the regulator actuator diaphragm and PRX Series escapes downstream through the bleed restriction in the pilot When outlet pressure increases over the setting of the pilot spring the pilot valve disk will be closed reducing loading pressure to the actuator diaphragm the pressure in the upper case will force the regulator to close A check valve is installed between inlet pressure to upper actuator casing and loading pressure impulse lines this valve will protect the diaphragm assembly from possible damage during startup limiting the differential between inlet and loading pressure EZH and EZHSO Series PILOT BLEED PILOT DISK RESTRICTION REGULATOR ACTUATOR DIAPHRAGM TYPE BRNO CHECK VALVE FILTER TYPE gt SA 2 V zm s B E
28. 1 Screw the eyebolts key 35 on the cap key 70 NPS 4 DN 100 Disk Maintenance EZHSO Series Only Refer to Figure 9 1 2 Remove cap screws key 77 Carefully lift the cap key 70 off of the upper actuator casing key 11 Remove O ring key 75 Inspect the O ring for damage or wear and replace if necessary Remove O ring key 69 Inspect the O ring for damage or wear and replace if necessary Lubricate O ring before placing inside the cap key 70 5 Remove special screws key 68 from sleeve 6 Carefully remove the trim system from the sleeve guide key 61 utilizing the eyebolt key 35 or stem nut 7 Remove socket head cap screws key 154 8 Lift off the disk holder assembly key 30 9 Remove the O ring key 29 Inspect the O ring 10 11 12 13 14 15 16 17 for damage or wear and replace if necessary Lightly lubricate O ring before placing in the sleeve adaptor key 27 Place disk holder assembly key 30 into sleeve adaptor key 27 and align screw holes Place on socket head cap screw key 154 Screw together the disk holder assembly key 30 into the sleeve adaptor key 27 See Torque Specifications Table 4 for proper torque values Lubricate the sleeve key 14 Carefully insert the trim system into the sleeve guide key 61 Align sleeve utilizing the socket hex cap screw key 74 as a guide Screw special screws key 68 to affix the sleeve
29. 2 S2 L2 69 77 74 75 M5 16 17 18 19 20 22 23 ma AN Rb AN ND 146 V L2 2 ny ZY 44 14 83 X10 ss 151 ts 7o 153 147 156 irae m zs Ll ul il 1 I I i i an 4 11 148 Q 10 i f a Gn E L2 Hase IE L2 H157 an 66 L2 H8 67 W 68 L2H 8 I L2 H64 6 5 L2H 7 13 L2 H150 149 61 2 1s2 qo 2 34 30 154 29 L2 L2 ind NPS 4 DN 100 APPLY LUBRICANT L SEALANT S L1 LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE L2 SILICONE BASED GREASE 1 ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS 2 ANAEROBIC METHACRYLATE SEALANT FOR THREADS 1 Lubricant and sealant must be selected such that they meet the temperature requirements Figure 9 EZHSO Series Main Valve Assembly continued 30 eo J e N x 78 A L2 L1 r r r N r N FSS S STRIS r N o Key Description 30 Disk Holder Assembly EZH Series NPS 1 DN 25 Body Nitrile NBR Fluorocarbon FKM Polyurethane PU NPS 2 DN 50 Body Nitrile NBR Fluorocarbon FKM Polyurethane PU NPS 3 DN 80 Body Nitrile NBR Fluorocarbon FKM Polyurethane PU NPS 4 DN 100 Body Nitrile NBR Fluorocarbon FKM EZHSO Series NPS 1 DN 25 Body Nitrile NBR Fluorocarbon FKM Polyuret
30. 244x012 GE42244X022 ERAA10096A0 GE44998X012 GE44998X022 M0274160X12 M0272750X12 M0276250X12 M0300100X12 ERAA04846A0 ERAA04789A0 ERAA05023A0 ERAA03714A0 ERAA03633A0 ERAA04692A0 M5077005X12 19B0819X012 M5077001X12 M5001004X12 M5011131X12 18B5515X012 M5011017X12 M5011018X12 M6010099X12 M6020065X12 M6010109X12 M6020159X12 M6010247X12 M6020165X12 M6010126X12 M6020127X12 EZH and EZHSO Series Key Description 35 36 37 38 39 43 44 59 60 61 62 63 64 66 67 68 69 70 71 72 73 74 75 77 78 82 83 Bracket or Eyebolt 2 required NPS 1 DN 25 Body Bracket NPS 2 DN 50 Body Bracket NPS 3 DN 80 Body Eyebolt NPS 4 DN 100 Body Eyebolt Nameplate Drive Screw 2 required Travel Indicator Plug NPS 1 2 and 3 DN 25 50 and 80 Bodies NPS 4 DN 100 Body Long Bolt 2 required EZH Series NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body Caution Warning Label NPS 1 2 and 3 DN 25 50 and 80 Bodies 2 required NPS 4 DN 100 Body 1 required Adjusting Screw Cap NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 and 4 DN 80 and 100 Bodies Flow Arrow NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Protective Cap 2 required NPS 1 2 and 3 DN 25 50 and 80 Bodies only NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body Sleeve Guide NPS 4 DN 100 Body only O ring NPS 1 2 and 3 DN 25 50 and 80 Bodies only
31. 50X12 M0194630X12 M0192090X12 M0194750X12 14361524052 14936224052 GF05679X012 M4691022X12 14518925072 1A3517K0012 1A519828992 M5001015X12 14341224122 14343324122 ERCA01576A0 M4692005X12 M4693002X12 GE00808X012 M4693003X12 M0297240X12 M0295800X12 GE44403X012 2 Parts are not orderable See sleeve subassembly table if it needs to be replaced 3 Included also in EZHSO Series sleeve subassembly NPS 1 2 and 3 DN 25 50 and 80 28 Key Description 26 Hex Nut NPS 1 2 and 3 DN 25 50 and 80 Bodies only NPS 1 DN 25 Body 4 required NPS 2 DN 50 Body 6 required NPS 3 DN 80 Body 4 required 27 Sleeve Adaptor EZH Series NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body EZHSO Series NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body 28 O ring NPS 1 2 and 3 DN 25 50 and 80 Bodies only 29 O ring EZH SERIES NPS 1 DN 25 NPS 2 DN 50 NPS 3 DN 80 NPS 4 DN 100 EZHSO SERIES NPS 1 DN 25 NPS 2 DN 50 NPS 3 DN 80 NPS 4 DN 100 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Part Number 1A341224122 1A341224122 M4692004X12 M0274250X12 M0272570X12 M0276340X12 M0300090X12 GE40691X012 GE40621X012 GE41032X012 GE41614X012 M6020144X12 M6020143X12 M6020112X12 M6020147X12 M6020171X12 GE23545X012 1H9938X0012 1R397106382 1H742206992 M6020171X12 44 R R R R o 0 amp
32. 80 Body M0192240X12 NPS 3 DN 80 Body NPS 4 DN 100 Body M0303370X12 NPS 4 DN 100 Body 19 Outlet Plate LE ct NPS 1 DN 25 Body NPS 1 DN 25 Body M0274230X12 Meo DNO Boy NPS 2 DN 50 Body M0272600X12 ody NPS 4 DN 100 Body Recommended spare part 2 Parts are not orderable See sleeve subassembly table if it needs to be replaced 26 Part Number M0276310X12 M0300050X12 GE29608X012 GE28380X012 GE29306X012 GE44704X012 M6020021X12 M5011005X12 19B0829X012 M5011140X12 M5011157X12 M6020120X12 M0194440X12 M0194620X12 M0192080X12 M0300020X12 M0194480X12 M0194660X12 M0192120X12 M0300030X12 EZH and EZHSO Series TRAVEL INDICATOR DETAIL SY N VERSION WITHOUT TRAVEL INDICATOR DETAIL i g Y g Y ZA S ONY S2 L2 S2 L2 A Y 6 44 13 44 10 83 35 70 72 69 77 74 75 15 16 17 L2 18 L2H 8 10 11 19 L2H9 20 uH 9 L1 22 L2 H 64 8 L2 L2 8 H L2 pe e L2 S1 L2 NPS 4 DN 100 MLM1945 B L APPLY LUBRICANT L SEALANT S L1 LITHIUM HYDROXYSTEGRATE NL
33. EZHSO Series Damper and Restrictor Maintenance 1 Remove screw key 31 and plate key 29 off from the body key 16 2 Remove ring nuts key 30 3 Remove damper adjusting screw with hole key 27 5 Remove and inspect O ring key 28 for damage or wear and replace if necessary Lightly lubricate O ring before placing on the adjusting screw Insert damper adjusting screw into the body key 16 and tighten Insert ring nut key 30 and tighten Back out damper adjusting screw until it stops Remove restrictor adjusting screw with hole key 32 Remove and inspect O ring key 28 for damage or wear and replace if necessary Lightly lubricate O ring before placing on the adjusting screw Insert restrictor adjusting screw into the body key 16 and completely tighten Insert ring nut key 30 and completely tighten Back out restrictor adjusting screw 1 2 turn Note When using a Type PRX 120 pilot with a Type PRX 125 pilot as a monitor use the following settings Restrictor completely tighten and then back out three full turns Damper back out until it stops Install plate Key 29 and screw key 31 Type SA 2 1 2 22 Disconnect pilot supply filter regulator and remove it from the line Remove cap screws washers and nuts keys 2 9 and 10 from body key 7 and separate filter cover key 11 and regulator cover key 19 from the body key 7 Separate loose components from the body
34. GI 2 GRADE GREASE L2 SILICONE BASED GREASE 1 ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS S2 ANAEROBIC METHACRYLATE SEALANT FOR THREADS 1 Lubricant and sealant must be selected such that they meet the temperature requirements Figure 8 EZH Series Main Valve Assembly continued 27 EZH and EZHSO Series MLM1945 B NPS 4 DN 100 Figure 8 EZH Series Main Valve Assembly continued Key Description 20 Diaphragm NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body 21 Cap Screw NPS 1 DN 25 Body 14 required for EZH Series 16 required for EZHSO Series NPS 2 DN 50 Body 14 required for EZH Series 16 required for EZHSO Series NPS 3 DN 80 Body 14 required for EZH Series 16 required for EZHSO Series NPS 4 DN 100 Body 16 required 22 Plain Washer NPS 1 DN 25 Body 16 required NPS 2 DN 50 Body 16 required NPS 3 DN 80 Body 16 required NPS 4 DN 100 Bogy 16 required 23 HexNut NPS 1 DN 25 Body 16 required NPS 2 DN 50 Body 16 required NPS 3 DN 80 Body 16 required NPS 4 DN 100 Body 16 required 24 Continuous Thread Stud Bolt NPS 1 2 and 3 DN 25 50 and 80 Bodies only NPS 1 DN 25 Body 4 required NPS 2 DN 50 Body 6 required NPS 3 DN 80 Body 4 required 25 Intermediate Flange NPS 1 2 and 3 DN 25 50 and 80 Bodies only NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body Recommended spare part Part Number M01944
35. Instruction Manual Form 5757 January 2015 EZH and EZHSO Series EZH and EZHSO Series Pressure Reducing Regulators W8480 Figure 1 EZH Series Pressure Reducing Regulator Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion and or fire causing property damage and personal injury or death Fisher regulators must be installed operated and maintained in accordance with federal state and local codes rules and regulations and Emerson Process Management Regulator Technologies Inc Emerson instructions If the regulator vents gas or a leak develops in the system service to the unit may be required Failure to correct trouble could result in a hazardous condition Call a gas service person to service the unit Only a qualified person must install or service the regulator www fisherregulators com C W8346 W8348 TYPE PRX 120 TYPE PRX 120 AP Figure 2 PRX Series Pressure Reducing Pilots Introduction Scope of the Manual This manual provides installation startup and maintenance instructions and parts ordering information for the EZH and EZHSO Series pressure reducing regulators PRX Series pilots and Type SA 2 pilot supply filter regulator Information on other equipment used with this regulator is found in separate manuals Product Description EZH Series Spring to Close and EZHSO Series Spring to Open regulators are accur
36. Nipple Internal Connector Steel Fittings with Stainless steel Tubing Stainless steel Fittings and Tubing PRX Series Pilots Figure 13 Key Description 14 15 16 17 18 Parts Kits Elastomer Parts Kits include keys 4 5 14 17 18 25 and 28 Types PRX 120 and PRX 125 Nitrile NBR Fluorocarbon FKM Types PRX 120 AP and PRX 125 AP Nitrile NBR Fluorocarbon FKM Adjusting Screw Locknut Cap Upper Cover O ring Nitrile NBR Fluorocarbon FKM O ring Nitrile NBR Fluorocarbon FKM Upper Spring Seat Spring Upper Cover Lower Spring Seat Machine Screw Washer Filter Upper Diaphragm Plate Diaphragm Nitrile NBR Fluorocarbon FKM Lower Diaphragm Plate Body Orifice O ring Nitrile NBR Fluorocarbon FKM Lower Cover O ring Polyurethane PU Fluorocarbon FKM Recommended spare part Part Number Part Number RPRXOOXON12 RPRXOOXOF 12 RPRXOOXON12 RPRXOOX0F 12 M0253340X12 M5036008X12 M0253350X12 M6010178X12 M6020112X12 M6010005X12 M6020001X12 M0253360X12 See Table 2 M0298540X12 M0253380X12 M5011018X12 M5055001X12 M4500367X12 M0253390X12 GG05785X012 GG05785X022 M0253410X12 M0253310X12 M6010003X12 M6020126X12 M6010098X12 M6020132X12 EZH and EZHSO Series Key Description 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 Orifice Nut Lower Cover Pad Holder Polyurethane PU Fluorocarbon FKM Stem Nameplate Stem O ring Nit
37. R L M A Y v PILOT LOWE DIAPHRAGM MAIN VALVE DISK PLUG EZHSO SERIES M1011 INLET PRESSURE E OUTLET PRESSURE TYPE PRX S BLEED PORT TYPE SA 2 ATMOSPHERIC PRESSURE LOADING PRESSURE NSW PILOT SUPPLY PRESSURE B SUPPLY PORT L LOADING PORT A SENSING PORT M INLET PORT V SENSING PORT R PILOT SUPPLY PORT Figure 4 EZHSO Series Spring to Open Version Operational Schematics EZH and EZHSO Series Adjustment The adjustment of the regulators Figures 3 and 4 is performed by means of the pilot adjusting screw which varies the compression of the control spring Adjustment is performed while the regulator is in operation with the aid of a pressure gauge to monitor downstream pressure Note The shut off valve downstream of the regulator must not be completely closed as it is necessary that a small quantity of gas flows downstream to allow the outlet side to vent when it is necessary to lower the pressure Loosen the PRX Series pilot locknut and turn the adjusting screw slowly clockwise to increase outlet pressure and counterclockwise to decrease outlet pressure Use a pressure gauge to monitor the outlet pressure until the desired pressure is reached No adjustment is needed to the Type SA 2 pre regulator Monitoring Systems Monitoring regulation is overpressure protection by containment therefore there is no relief valve to vent to the atmosphere When the work
38. REZH2X00N12 REZH2X00F 12 REZH2X00P12 REZH3X00N12 REZH3X00F 12 REZH3X00P12 REZH4X00N12 REZH4X00F 12 REZHS1X0N12 REZHS1X0F 12 REZHS1X0P12 REZHS2X0N12 REZHS2X0F 12 REZHS2X0P12 REZHS3X0N12 REZHS3X0F 12 REZHS3X0P12 REZHS4X0N12 REZHS4X0F 12 REZH1X00N22 REZH1X00F22 REZH1X00P22 REZH2X00N22 REZH2X00F22 REZH2X00P22 REZH3X00N22 REZH3X00F22 REZH3X00P22 REZH4X00N22 REZH4X00F22 Key Description 2 4 7 8 9 NPS 4 DN 100 include keys 8 9 15 17 20 29 30 34 63 64 67 69 71 75 142B 143 153 154 and 158 NPS 1 DN 25 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 2 DN 50 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 3 DN 80 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 4 DN 100 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Body Seat Ring NPS 1 DN 25 Body For 10096 Capacity For 8096 Capacity For 5096 Capacity For 3096 Capacity NPS 2 DN 50 Body For 10096 Capacity For 8096 Capacity For 5096 Capacity For 3096 Capacity NPS 3 DN 80 Body For 10096 Capacity For 8096 Capacity For 5096 Capacity For 3096 Capacity NPS 4 DN 100 Body EZH Series only For 10096 Capacity For 8096 Capacity For 5096 Capacity For 3096 Capacity NPS 4 DN 100 Body EZHSO Series only For 10096 Capacity For 8096 Capacity For 5096 Capacity For 3096 Capacity Cage NPS 1 DN 25 standard
39. SURE L LOADING PORT R PILOT SUPPLY PORT M PILOT SUPPLY PRESSURE A SENSING PORT M INLET PORT Figure 3 EZH Series Spring to Close Version Operational Schematics Pilot Supply Filter Regulator The Type SA 2 pilot supply filter regulator provides a constant supply pressure to the PRX Series pilot that is approximately 45 psi 3 1 bar over set pressure The Type SA 2 has an integral 5 micron filter Principle of Operation EZH Series Spring to Close Version EZH Series Single Pilot Regulator The pilot operated EZH Series Spring to Close version will fail in close position with a main valve diaphragm failure or lack of pressure supply to the pilot see Table 3 for Failure Mode Analysis EZH Series Figure 3 uses inlet pressure as the operating medium which is reduced through pilot operation to load the regulator actuator diaphragm Outlet or downstream pressure opposes loading pressure in the actuator and also opposes the pilot control spring Pilot is supplied with pressure coming from pre regulator Type SA 2 which reduces inlet pressure to the constant value of outlet pressure plus approximately 45 psi 3 1 bar When outlet pressure drops below the setting of the pilot control spring pilot control spring force on the pilot diaphragm opens the pilot valve disk providing additional loading pressure to the regulator actuator diaphragm This diaphragm loading pressure opens the main valve disk supplying
40. ZHSO Open diga be closed present Sour gas pressure EZH Open ea Pilot lower Debris or aromatics Decrease loading EZHSO Open TUEST diaph Pilot cannot control S iaphragm present Sour gas pressure EZH PENA Close Pilot upper Pilot cannot feed Debris or aromatics Decrease loading EZHSO Open mue diaphragm the regulator present Sour gas pressure EZH fx Close Balancing of Not proper EZHSO Open x Pressures and Regulator performance of Debris or aromatics charge or discharge diaphragm the Loading present Sour gas of the loadin Pressure Chamber 9 EZH Hes Close pressure chamber Type SA 2 loading upper casing of EZHSO Close Pilot Frozen Pilot Moisture in the gas regulator Pilot not Type SA 2 working high pressure drop supplying loading pressure to EZH Close lower casing EZH and EZHSO Series TYPE PILOT CONTROL SPRING WWW SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS WO WEEE SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS SSNSSSSSSSSSSSSSSSSSSSSSS A 2 PILOT UPPER N N DIAPHRAGM N N N N PILOT BLEED N RESTRICTION PILOT DISK N N N NY N NI R PILOT LOWER DIAPHRAGM CHECK VALVE UTER DIAPHRAGM MAIN VALVE DISK PLUG EZH SERIES E0873 INLET PRESSURE ES OUTLET PRESSURE TYPE PRX S BLEED PORT TYPE SA 2 AIMOSPHEBIC TERRE B SUPPLY PORT V SENSING PORT LOADING PRES
41. ZHSO Series HOT WATER INLET OUTLET LM1162 Industrial Regulators Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75070 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Shanghai 201206 China Tel 86 21 2892 9000 Europe Bologna 40013 Italy Tel 39 051 419 0611 Middle East and Africa Dubai United Arab Emirates Tel 971 4811 8100 HOT WATER INLET OUTLET OOo SENSING PORT ELA sarar q LW NALLLILLLLLLLL LLL RA a LZ Sw KAT One i A CSS oF ne wl LLL ZA Q ILJLLLLLLLLLLLLLLSA 144 OUTLET R PORT P 4 Q S A e RSA Natural Gas Technologies Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75070 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Singapore 128461 Singapore Tel 65 6770 8337 Europe Bologna 40013 Italy Tel 39 051 419 0611 Chartres 28008 France Tel 33 2 37 33 47 00 Middle East and Africa Dubai United Arab Emirates Tel 971 4811 8100 For further information visit www emersonprocess com regulators Figure 14 Type SA 2 Pilot Supply Filter Assemblies if gt TESCOM Emerson Process Management Tescom Corporation USA Headquarters Elk River Minnesota 55330 2445 USA Tels 1 763 241 3238 1 800 447 1250 Europe Selmsdorf 23923 Germany Tel 49 38823 31
42. ace the disk holder key 30 and disk retainer key 31 on the sleeve adaptor key 27 Insert the spring lock washers key 32 and hex socket cap screws key 33 and tighten See Torque Specifications Table 4 for proper torque values 11 12 13 14 Lightly lubricate the O rings keys 15 and 17 and the inner and outer diaphragm key 20 edges Place the inlet plate key 18 and the diaphragm key 20 on the sleeve key 14 Make sure O rings keys 15 and 17 are correctly positioned Insert and tighten the hex socket cap screws key 16 See Torque Specifications Table 4 for proper torque values Note When tightening fasteners arranged in a circular pattern alternate the tightening of each fastener with the fastener directly across from it using a star criss cross pattern for five times until proper specified torque is achieved Each time around when all screws are tightened to the required torque the diaphragm will compress a little until the plates are in direct metal to metal contact It will take at least five times around before this happens Only then will the applied torque on each screw remain at the required value Carefully lift the lower actuator casing assembly key 5 and place on the body key 1 Make sure to match up the alignment marks Secure with stud bolts and nuts keys 24 and 26 See Torque Specifications Table 4 for proper torque values Lightly lubricate the spring key 13 a
43. an upstream or downstream monitoring system is largely a matter of personal preference or company policy In normal operation of a wide open configuration the working regulator controls the system s outlet pressure With a higher outlet pressure setting the monitor regulator senses a pressure lower than its setpoint and tries to increase outlet pressure by going wide open If the working regulator fails the monitoring regulator assumes control and holds the outlet pressure at its outlet pressure setting Figure 5 shows an upstream wide open monitor EZH Series failed close and a downstream active regulator EZHSO Series failed open In this installation if the EZHSO Series regulator no longer controls downstream pressure it will remain open letting the EZH Series monitor regulator take control of the downstream pressure If the EZH Series should fail the monitor regulator will go closed and protect against overpressure to the downstream system Working Monitoring System Figure 6 In a working monitoring system the upstream regulator requires two pilots and it is always the monitoring regulator The additional pilot permits the monitoring regulator to act as a series regulator to control an intermediate pressure during normal operation In this way both units are always operating and can be easily checked for proper operation See Installation section In normal operation the working regulator controls the outlet pressure
44. ate key 13 diaphragm key 14 lower diaphragm plate key 15 and O rings keys 18 and 25 Inspect diaphragm and O rings for damage or wear and replace if necessary Lightly lubricate the O ring key 25 Place O ring over the stem key 23 and press it down into the body key 16 Set the lower diaphragm plate key 15 into the body key 16 Lightly lubricate the rims of the diaphragm key 14 and place it in the body key 16 on top of the lower diaphragm plate key 15 Set the upper diaphragm plate key 13 on top of the diaphragm key 14 Place washer key 11 and stem nut key 26 on the stem key 23 and tighten using a wrench to hold the stem Place the lower spring seat key 9 on the upper diaphragm nut key 26 and mount the upper cover key 8 on top of the body key 24 and the diaphragm key 14 Place and uniformly tighten the machine screws key 10 to hold the body key 24 and upper cover key 8 together Position the diaphragm convolution facing down and make sure that the diaphragm is not deformed and is properly installed Install spring key 7 and upper spring seat key 6 on top of the lower spring seat key 9 inside the upper cover key 8 Install Cap key 3 Screw in adjusting screw key 1 at desired spring compression and use the lock nut key 2 to lock the adjusting screws position Refer to Pilot Adjustment section page 11 to adjust pilot settings 21 EZH and
45. ate pilot operated pressure balanced soft seated regulators They are designed for use in high pressure natural gas transmission city gate stations large capacity distribution systems and power plant feeds They provide smooth and reliable operation tight shutoff and long life Spring to Open version could be used when other overpressure protection options are foreseen like for example a monitor In this case in event of failure the main regulator will stay completely open allowing the monitor to take control The monitor could be Spring to Close to ensure a double protection to downstream pipe EMERSON Process Management D103077X012 EZH and EZHSO Series Specifications Ratings and specifications for the EZH and EZHSO Series are listed in the Specifications section below Specifications for specific regulator constructions are stamped on a nameplate attached to either the main actuator or the pilot spring case Available Configurations Type EZH Spring to Close Pilot operated pressure reducing regulator for low to high outlet pressure Type EZHSO Spring to Open Pilot operated pressure reducing regulator for low to high outlet pressure Type EZHOSX Type EZH with a Type OS2 slam shut device for overpressure OPSO or overpressure and underpressure OPSO UPSO protection Type EZHSO OSX Type EZHSO with a Type OS2 slam shut device for overpressure OPSO or overpressure and underpressure OPSO UPSO protection
46. ator in last position which could cause incorrect pressure regulation 3 Turn the restrictor screw an additional turn counterclockwise from fully seated This increases the flow path of the restrictor If additional tuning is required repeat step 2 Follow this method until desired performance is achieved EZH and EZHSO Series Startup For EZH Series 1 Make sure all block valves vent valves and control line valve s are closed 2 Back out the pilot adjusting screw s 3 Slowly open the valves in the following order a Inlet block valves b Pilot supply and control live valve s if used 4 Crack open the outlet block valve or bypass valve to allow minimum flow For a single regulator Figure 3 set the pilot to the desired outlet control pressure according to the Pilot Adjustment procedure For a wide open downstream monitor installation Figure 5 adjust the upstream working pilot until intermediate pressure is higher than the desired setpoint of the monitor pilot Adjust the downstream monitoring pilot to the desired monitoring takeover pressure Reduce the upstream pilot to the normal outlet pressure setting For a wide open upstream monitor installation Figure 5 adjust the downstream working pilot to a setpoint higher than the setpoint of the monitor pilot Adjust the upstream monitoring pilot to the desired monitoring takeover pressure Reduce the downstream pilot to the normal outlet pressure setting
47. ccording to the Pilot Adjustment procedure For a wide open downstream monitor installation Figure 5 adjust the upstream working pilot until intermediate pressure is higher than the desired setpoint of the monitor pilot Adjust the downstream monitoring pilot to the desired monitoring takeover pressure Reduce the upstream pilot to the normal outlet pressure setting For a wide open upstream monitor installation Figure 5 adjust the downstream working pilot to a setpoint higher than the setpoint of the monitor pilot Adjust the upstream monitoring pilot to the desired monitoring takeover pressure Reduce the downstream pilot to the normal outlet pressure setting 12 For a working monitor installation Figure 6 adjust the setpoint of the upstream monitor pilot Type PRX 125 to the desired maximum pressure Adjust the upstream working pilot Type PRX 120 to the desired intermediate pressure setting Adjust the downstream pilot to a pressure setting slightly above the upstream monitor pilot pressure setting Adjust the upstream monitor pilot to its desired setpoint Establish final desired downstream pressure by adjusting the downstream working regulator pilot 6 After adjusting the PRX Series pilot s to the desired pressure setting s slowly open the downstream block valve wide open 7 Close the bypass valve if used Shutdown If the pilot bleed control line pressure is shutdown first the downstream system may be subje
48. connection line from Port S to pipe A full bore NPS 1 4 ball valve for the vent line is preferred to provide sufficient flow 8 For optional remote pneumatic loading of a PRX Series pilot make the spring case piping connections just as they would be made for remote venting in step 4 Wide Open Monitor Regulator 1 Follow the procedures in the All Installations section and then continue with step 2 of this section The sense and bleed control lines of both the upstream and downstream pilots will be connected to the downstream piping see Figure 5 2 Connect the pilot supply line for the downstream regulator to the outlet R port of the Type SA 2 pilot supply filter regulator Working Monitor Regulator 1 Follow the procedure in the All Installations section and then continue with step 2 of this section The sense line of the upstream monitor pilot from Port A on the Type PRX 125 and the bleed Port S and sense lines Port A of the downstream pilot will be connected to the downstream piping see Figure 6 2 Connect an inlet supply line from the upstream piping to the inlet M port of the downstream Type SA 2 pilot supply filter regulator 3 Connect a control sense line from the A port of the upstream working Type PRX 120 pilot to the intermediate pressure portion of piping using 3 8 in 9 5 mm or larger outside diameter tubing 4 Connect a downstream bleed line from the S port of the upstream working T
49. cted to full inlet pressure 1 If the pilot setting must be changed be sure to keep some tension on the spring This will prevent trapping inlet pressure during blow down 2 Slowly close the valves in the following order a Inlet block valve b Outlet block valve c Control line valve s if used 3 Open the vent valves to depressurize the system Maintenance WARNING For both EZH and EZHSO Series never remove or disconnect the check valve installed between the two casings The regulator parts are subject to normal wear and must be inspected periodically and replaced as necessary The frequency of inspection and replacement depends on the severity of service conditions and on applicable federal state and local codes and regulations I WARNING To avoid personal injury or property damage from sudden release of pressure isolate the regulator from the pressure system and release all pressure from the pilot and main valve before performing maintenance operations er Uae Use proper lifting techniques when lifting the upper and lower actuator casings keys 11 and 5 off the EZH or EZHSO Series body key 1 The actuator assembly weighs more than 100 Ibs 45 kg or YU de Customer cannot use another type of eyebolt in the regulator Only Emerson parts can be used to repair the unit EZH and EZHSO Series Eyebolts are installed to aid in the handling and installation of the Regulator As
50. fore placing in the sleeve adaptor key 27 Place disk holder assembly key 30 onto disk retainer key 31 Place disk retainer key 31 with the disk holder assembly key 30 into sleeve adaptor key 27 and align screw holes Place lock washer key 32 onto the screws key 33 Screw together the disk retainer assembly into the sleeve adaptor key 27 See Torque Specifications Table 4 table for proper torque values Lubricate the sleeve key 14 Carefully insert the trim system into the sleeve guide key 61 utilizing eyebolt key 35 Align sleeve utilizing the socket hex cap screw key 74 as a guide Screw special screws key 68 to affix the sleeve system See Torque Specifications Table 4 for proper torque values Place O ring key 69 on cap Remove eyebolt key 35 from upper spring seat key 73 threaded hole Carefully place the cap on the upper actuator casing key 11 Lubricate cap screws key 77 and attach cap key 70 to the upper casing using cap screws key 77 See Torque Specifications Table 4 for proper torque values Note Rotate the cap such that the outer holes for sensing lines are in line with upper casing holes for sensing lines to validate the alignment and before 21 22 attaching cap check that travel indicator is aligned on the cap and on the upper actuator casing Mount O ring key 75 on the space between the cap key 70 and the upper actuator casing key 1
51. hane PU NPS 2 DN 50 Body Nitrile NBR Fluorocarbon FKM Polyurethane PU NPS 3 DN 80 Body Nitrile NBR Fluorocarbon FKM Polyurethane PU NPS 4 DN 100 Body Nitrile NBR Fluorocarbon FKM 31 Disk Retainer EZH Series only Nitrile NBR and Fluorocarbon FKM NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body EZH Series Polyurethane PU NPS 1 DN 25 NPS 2 DN 50 NPS 3 DN 80 EZHSO Series Polyurethane PU NPS 1 DN 25 NPS 2 DN 50 NPS 3 DN 80 32 Lock Washer EZH Series only NPS 1 DN 25 Body 1 required NPS 2 DN 50 Body 2 required NPS 3 DN 80 Body 3 required NPS 4 DN 100 Body 4 required 33 Socket Head Cap Screw EZH Series only NPS 1 DN 25 Body 1 required NPS 2 DN 50 Body 2 required NPS 3 DN 80 Body 3 required NPS 4 DN 100 Body 4 required 34 O ring NPS 1 DN 25 Nitrile NBR Fluorocarbon FKM NPS 2 DN 50 Nitrile NBR Fluorocarbon FKM NPS 3 DN 80 Nitrile NBR Fluorocarbon FKM NPS 4 DN 100 Nitrile NBR Fluorocarbon FKM Recommended spare part 1 When retrofitting an EZH Series with pins with the new cage it is also necessary to order the Seat Ring 4 Included also in sleeve subassembly Part Number M0280900X12 M0282130X12 ERAAO07132A0 M0280910X12 M0282140X12 ERAA07133A0 M0280920X12 M0282150X12 ERAA10096A0 M0299090X12 M0300120X12 GE42269X012 GE42269X022 ERAA07132A0 GE42168X012 GE42168X022 ERAA07133A0 GE42
52. head cap screws key 16 Lift off the diaphragm key 20 and the inlet plate key 18 Remove O rings keys 15 and 17 Inspect the diaphragm and O rings for damage or wear and replace if necessary Inspect the upper actuator casing key 11 O ring key 9 anti friction split rings key 8 and anti friction ring key 4 for damage or wear If damaged remove the O ring and split rings and replace with new parts Lightly lubricate the O ring and split rings Place the split rings in the body first then slide the O ring between the split rings Lubricate and reinstall the anti friction ring key 4 Remove hex nuts key 26 from the stud bolts key 24 Lift off the lower actuator casing key 5 Remove the hex socket cap screw key 154 Lift off the disk holder assembly key 30 Slide the sleeve key 14 out of the lower actuator casing key 5 and slide the outlet plate key 19 off of the sleeve Check the sleeve for scratches burrs or other damage and replace if necessary Inspect the lower actuator casing key 5 O rings keys 9 and 62 anti friction split rings key 8 and anti friction ring key 4 for damage or wear If damaged remove the O ring and split rings and replace with new parts Lightly lubricate the O ring key 9 and split rings Place the split rings in the body first then slide the O ring key 9 between the split rings Lubricate and mount O ring key 62 outside of the lower actuator cas
53. ing NPS 1 2 and 3 DN 25 50 and 80 Bodies NPS 4 DN 100 142A O ring Nitrile NBR Fluorocarbon FKM 142B O ring Nitrile NBR Fluorocarbon FKM 143 O ring 144 Spring Collet 145 Retaining Ring 146 147 Protective Cap EZHSO Series only Stem EZHSO Series only NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Upper Spring Seat EZHSO Series only NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Lower Spring Seat EZHSO Series only NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Ring Guide EZHSO Series only NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body 151 Stem Nut 2 required EZHSO Series only Hex Nut NPS 2 3 and 4 DN 50 80 and 100 Bodies EZHSO Series only O ring EZHSO Series only Hex Socket Cap Screw EZHSO Series only 1 required NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Stem Nut NPS 1 DN 25 Body EZHSO Series only Upper Spring Seat Adapter EZHSO Series only NPS 4 DN 100 Body Anti friction ring EZHSO Series only NPS 4 DN 100 Body O ring EZHSO Series only NPS 4 DN 100 Body 159 Check valve 160 Back up ring 2 required 192 Travel Indicator Scale 193 Washer EZHSO Series only 148 149 150 152 153 154 155 156 157 158 Recommended spare part 4 Included also in sleeve subassembly Part Numbe
54. ing key 5 Slide the outlet plate key 19 onto the sleeve key 14 and slide the sleeve into the lower actuator casing key 5 Place the disk holder assembly key 30 on the sleeve adaptor key 27 Insert the hex socket cap screw key 154 and tighten See Torque Specifications Table 4 for proper torque values 11 12 13 14 15 EZH and EZHSO Series Lightly lubricate the O rings keys 15 and 17 and the inner and outer diaphragm key 20 edges Place the inlet plate key 18 and the diaphragm key 20 on the sleeve key 14 Make sure O rings keys 15 and 17 are correctly positioned Insert and tighten the hex socket cap screws key 16 See Torque Specifications table for proper torque Carefully lift the lower actuator casing assembly key 5 and place on the body key 1 Make sure to match up the alignment marks Secure with stud bolts and nuts keys 24 and 26 See Torque Specifications Table 4 for proper torque values Carefully place the upper actuator casing key 11 on the lower actuator casing key 5 Make sure to match up the alignment marks Insert the two long bolts key 39 180 apart and away from flanges Place the washers key 22 hex nuts key 23 and brackets key 35 on the long bolts and evenly tighten Using proper bolting techniques install remaining short cap screws key 21 washers and hex nuts See Torque Specifications Table 4 for proper torque values Tighten hex nuts key
55. ing regulator fails to control the pressure a monitor regulator installed in series which has been sensing the downstream and control pressure goes into operation to maintain the downstream pressure at a slightly higher than normal set pressure During an overpressure situation monitoring keeps the customer on line Also testing is relatively easy To perform a periodic test on a monitoring regulator increase the outlet set pressure of the working regulator and watch the outlet pressure gauge to determine if the monitoring regulator takes over at the appropriate outlet pressure Wide Open Monitoring System Figure 5 There are two types of wide open monitoring systems upstream and downstream The difference between upstream and downstream monitoring is that the functions of the regulators are reversed Systems can be changed from upstream to downstream monitoring and vice versa by simply reversing the setpoints TYPE SA 2 CHECK VALVE CHECK VALVE EZH SERIES M1164 EE INLET PRESSURE EE OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE TYPE PRX S BLEED PORT TYPE SA 2 EZH and EZHSO Series EZHSO SERIES B SUPPLY PORT L LOADING PORT A SENSING PORT V SENSING PORT R PILOT SUPPLY PORT M INLET PORT IIIIITI INTERMEDIATE PRESSURE HJ PILOT SUPPLY PRESSURE Figure 5 Wide Open Monitoring System Operational Schematics of the two regulators The decision to use either
56. let plate key 18 to replace diaphragm key 20 and O ring key 17 Align screw holes on the cap key 70 to the sleeve guide screw key 66 Remove sleeve guide key 61 utilizing cap key 70 to unscrew Inspect O rings keys 9 and 64 for damage or wear replace anti friction ring key 8 and O ring key 9 if necessary Unscrew 8 cap screws key 6 and remove crush washers key 67 Lift off lower casing key 5 Inspect O ring keys 7 and 63 for damage or wear Replace if necessary 5 Remove cage key 78 10 11 12 13 14 15 Remove seat ring key 2 Inspect seat ring for damage or wear If damaged replace with new parts Remove O ring key 34 from body Inspect for damage or wear If damaged replace with new parts Lubricate O ring key 34 and replace into the body Place seat ring key 2 on top of O ring key 34 in body with the curved side down and seat edge up Place cage key 78 on the top of seat ring key 2 Place lower casing key 5 on top of the body Replace washer key 67 and tighten cap screws key 6 Screw sleeve guide key 61 into lower casing key 5 utilizing cap key 70 Lubricate the sleeve key 14 in the upper plate contact area and assemble the diaphragm plates system on the sleeve system Tighten screws key 16 using a star criss cross pattern for five times until proper specified torque is achieved Screw the special screws key 68
57. nd SA 2 Fluorocarbon FKM elastomer is limited to 0 F 18 C 4 Maximum Operating Differential Pressure is 1400 psid 96 5 bar d for NPS 1 DN 25 EZHSO Series Pilot Descriptions The EZH and EZHSO Series pressure reducing regulators include a PRX Series pilot mounted on the main valve for pressure reducing or wide open monitoring applications PRX Series pressure reducing pilots have the ability to handle a wide range of setpoints from 14 5 to 1160 psig 1 00 to 80 0 bar Type PRX 120 Outlet pressure range of 14 5 to 435 psig 1 00 to 30 0 bar The Type PRX 120 can be used as the pilot on single stage pressure reducing regulators or as the monitor pilot or as the working pilot in wide open monitor systems Type PRX 120 AP Outlet pressure range of 435 to 1160 psig 30 0 to 80 0 bar The Type PRX 120 AP can be used as the pilot on single stage pressure reducing regulators or as the monitor pilot or as the working pilot in wide open monitor systems Type PRX 125 Identical to the Type PRX 120 except the restriction screw is removed The Type PRX 125 can only be used as the monitor override pilot on working monitor applications Type PRX 125 AP Identical to the Type PRX 120 AP except the restriction screw is removed The Type PRX 125 AP can only be used as the monitor override pilot on working monitor applications EZH and EZHSO Series Table 1 Main Valve Body Sizes End Connection Styles and Body Ratings
58. nd place on the inlet plate key 18 Carefully place the upper actuator casing key 11 on the lower actuator casing key 5 Make sure to match up the alignment marks Insert the two long bolts key 39 180 apart and away from flanges Place the washers key 22 hex nuts key 23 and brackets key 35 on the long bolts and evenly tighten Using proper bolting techniques install remaining short bolts key 21 washers and hex nuts See Torque Specifications Table 4 for proper torque values Place travel indicator assembly keys 138 139 140 141 142A or 142B 143 144 145 160 and 192 in the upper actuator casing key 11 if present and tighten the travel indicator fitting key 141 For EZHSO Series 1 Make a mark on the upper actuator casing key 11 lower actuator casing key 5 intermediate flange key 25 and body key 1 to indicate proper alignment 10 Remove travel indicator assembly keys 138 139 140 141 142A or 142B 143 144 145 160 and 192 if present by loosening the travel indicator fitting key 141 and lifting out the travel indicator assembly Please see Travel Indicator Maintenance section for proper maintenance procedure Remove protective cap key 146 Loosen and remove hex nuts key 151 Remove cap screws key 21 washers key 22 and hex nuts key 23 Carefully lift the upper actuator casing key 11 off the lower actuator casing key 5 Remove the socket
59. ng a regulator with threaded NPT end connections Use gaskets between pipeline and regulator flanges when installing a regulator with flanged end connections When installing butt weld end connections remove trim before welding and make sure to use approved welding practices Use approved piping procedures when installing the regulator EZH and EZHSO Series A regulator may vent some gas to the atmosphere In hazardous or flammable gas service vented gas may accumulate causing personal injury death or property damage due to fire or explosion Install vent line s from the regulator pilot s to a remote safe location away from air intakes or any hazardous location The end of the vent line or stack opening must be pointed down and protected against condensation or clogging PRX Series pilots have a 1 4 NPT vent connection in the spring case The pilot vent opening should be pointed down Protect the vent opening from condensation or clogging To remotely vent gas from the spring case remove the screened vent and connect 1 4 in 6 4 mm piping or tubing to the spring case connection The piping or tubing should vent to a safe location have as few elbows as possible and have a screened vent that points down on its exhaust Install the regulator and any remote vent piping or tubing so that the vent is pointed down and protected from condensation freezing or substances that may clog it To avoid freeze up because of pres
60. o 115 11 to 13 Stud Bolts key 24 50 to 70 68 to 95 50 to 70 68 to 75 100 to 120 136 to 163 Cap Screws key 21 50 to 55 68 to 75 130 to 150 176 to 203 250 to 270 339 to 366 280 to 310 380 to 420 Cap Screws key 6 50 to 60 68 to 81 50 to 60 68 to 81 70 to 95 95 to 129 140 to 155 190 to 210 Socket Head Cap Screws key 33 30 to 40 3 4 to 4 5 50 to 60 5 6 to 6 8 80 to 100 9 to 11 80 to 100 9 to 11 Smart Screws key 68 31 to 40 3 5 to 4 5 Socket Head Cap Screws key 74 T 26 to 35 2 9 to 4 Cap Screws key 77 90 to 110 122 to 149 Sleeve Guide key 61 130 to 140 176 to 190 Cap Screw key 154 16 1 8 50 5 6 10 14 2 9 to 3 5 3 9 to 4 7 Stem Nut key 151 32 43 32 43 45 61 45 to 50 61 to 68 Stem Nut key 155 30 41 Hex Nut key 152 40 54 60 81 45 to 50 61 to 68 1 Torque specifications are given in in lbs 4 Vent pressure from bleed line until regulator closes and then shut off vent A full bore NPS 1 4 ball valve for the vent line is preferred 5 Slowly open downstream valve making sure that there is a constant sufficient pressure drop across the regulator If downstream pressure climbs too close to upstream pressure a minimum DP of 55 psi 3 8 bar must be guaranteed the regulator will again fully open In this case start up procedure needs to be repeated For a single regulator Figure 4 set the pilot to the desired outlet control pressure a
61. r M0194580X12 M0196770X12 M0194870X12 M0210910X12 ERSA01803A0 ERSA01801A0 ERSA01802A0 ERSA02571A0 ERSA02798A0 ERSA02569A0 ERSA01824A0 M6010001X12 M6020066X12 1H2926X0032 1H2926X0022 M6020005X12 M019218X012 M4500325X12 GE30222X012 GE29590X012 GE26223X012 GE44786X012 M0303340X12 GE29587X012 GE26227X012 GE29302X012 GE36696X012 GE29586X012 GE26250X012 GE29303X012 M0303360X12 GE29602X012 GE28486X012 GE29307X012 M0303380X12 M5002006X12 M5036006X12 11230906382 FA402505X12 M5011014X12 FA402036X12 FA402505X12 GE29864X012 M0303350X12 GE44971X012 GE45201X012 15A6011E182 1N659106242 M0201990X12 FA405007X12 5 Included also in sleeve subassembly NPS 1 2 and 3 DN 25 50 and 80 32 Mounting Parts Figures 10 through 12 Standard Configurations for Single Pilot and Working Monitor Pilots Key Description Part Number 46 Pipe Nipple 47 Pipe Nipple 8 required for Working Monitor Pilots 45 Internal Elbow for Working Monitor Pilots only Pre Piped Pilot Supply Single Pilot Configuration with standard body or tapped inlet body Key Description Part Number 47 Pipe Nipple 4 e 48 Tube Elbow 4 required Steel Fittings with Stainless steel Tubing Stainless steel Fittings and Tubing 8 49 External Tube Connector Steel Fittings with Stainless steel Tubing Stainless steel Fittings and Tubing
62. r actuator casing assemblies keys 11 and 5 and position it in the body key 1 Screw in stud bolts and nuts keys 24 and 26 See Torque Specifications Table 4 for proper torque values NPS 1 through 3 DN 25 through 80 Actuator Assembly Maintenance Refer to Figures 8 and 9 For EZH Series 1 2 Make a mark on the upper actuator casing key 11 lower actuator casing key 5 intermediate flange key 25 and body key 1 to indicate proper alignment Remove travel indicator assembly keys 138 139 140 141 142A or 142B 143 144 145 160 and 192 if present by loosening the EZH and EZHSO Series travel indicator fitting key 141 and lifting out the travel indicator assembly See the Travel Indicator Maintenance section for the proper maintenance procedure Loosen out the hex nuts key 23 and remove the washers key 22 and the cap screws key 21 Remove all the short bolts first then evenly remove the two long bolts key 39 indicated with LB on the head and brackets key 35 Make sure to balance the upper actuator casing while removing the spring tension Carefully lift the upper actuator casing key 11 off the lower actuator casing key 5 Remove spring key 13 Remove the socket head cap screws key 16 Lift off the diaphragm key 20 and the inlet plate key 18 Remove O rings keys 15 and 17 Inspect the diaphragm and O rings for damage or wear and replace if necessary
63. ricate the O ring and place in the body key 16 Install the orifice 6 Set the pad holder key 22 in the body key 16 7 Lightly lubricate the rims of the diaphragm key 14 10 and place it on top of the pad holder key 22 Set the upper diaphragm plate key 13 on the diaphragm key 14 Lightly lubricate the O ring key 18 and place it in the lower cover key 21 Place the washer key 11 and stem nut key 20 on the stem key 23 and tighten f also performing Upper Case Maintenance skip to step 2 of the Upper Case Maintenance section Insert machine screws key 10 in the lower cover key 21 and tighten uniformly to ensure proper seal Upper Diaphragm Maintenance 1 2 Disconnect pilot and remove it from the line Loosen locknut key 2 and back out adjusting screw key 1 until compression is removed from the spring Remove cap key 3 10 11 12 13 14 EZH and EZHSO Series Lift the upper spring seat key 6 spring key 7 and O ring key 4 out of the upper cover key 8 Inspect O ring and replace if necessary Remove the machine screws key 10 and the washers key 11 separate the upper cover key 8 from the body key 16 and lift the lower spring seat key 9 away from upper diaphragm nut key 26 Use a wrench to hold stem key 23 securely while removing the upper diaphragm nut Remove remaining loose components washer key 11 upper diaphragm pl
64. rile NBR Fluorocarbon FKM Upper Diaphragm Nut Damper Adjusting Screw with Hole Restrictor Damper O ring Damper Restrictor Plate Types PRX 120 and PRX 120 AP Types PRX 125 and PRX 125 AP Ring Nut Nameplate Screw Restrictor Adjusting Screw with Hole Plug Types PRX 125 and PRX 125 AP only Plug Types PRX 125 and PRX 125 AP only Spring Barrel Extension for AP Part Number M0253440X12 M5002004X12 M0298600X12 M0253400X12 M0279950X12 M0253430X12 M6010223X12 M6020133X12 M5028005X12 M0253480X12 M6020054X12 M0254400X12 M0257930X12 M0253490X12 M5061001X12 M0253480X12 M0257920X12 M4500328X12 M0274100X12 Type SA 2 Pilot Supply Filter Regulators Figure 14 Key Description c1 0 Ky Oo ON 11 12 13 14 15 16 17 18 19 20 21 Parts Kits Elastomer Parts Kits include keys 6 12 13 15 and 18 Nitrile NBR Fluorocarbon FKM Spring Socket Head Cap Screw Washer Plate Regulator Seat O ring Body Filter Net Washer Nut Filter Cover Felt O ring Spring Pad Holder Unit Nameplate Screw Unit Diaphragm Regulator Cover Spring Washer Nut Part Number GD89995X012 GD89995X022 M0192560X12 M5058003X12 M0248490X12 M0174470X12 M0200830X12 M6010013X12 M0297920X12 M0102200X12 M5057002X12 M5060005X12 M0174411X12 M0102210X12 M6010095X12 M0105970X12 M0233370X12 M0300470X12 M0200790X12 M0174460X12 M0239890X12 M5001003X12 M5006012X12 39 EZH and E
65. s Travel Indicator Assemblies Part Numbers DESCRIPTION EZH and EZHSO Series MATERIAL Nitrile NBR NPS 1 DN 25 ERSA01539A0 NPS 2 DN 50 ERSA01546A0 NPS 3 DN 80 ERSA01547A0 NPS 4 7 DN 100 ERSA01549A0 1 The assemblies include keys 138 139 140 141 142B 143 144 145 160 and 192 Table 6 EZH EZHSO Series Sleeve Assemblies Part Numbers DESCRIPTION NPS 1 DN 25 NPS 2 DN 50 NPS 3 DN 80 NPS 4 DN 100 EZHSO Series ERCA02689A0 ERCA02690A0 ERCA02691A0 M2201053X12 EZHSenes _ 4 exem RS PutRekEmuS OO O ERbSEEEREHS M2201052X12 24 EZH and EZHSO Series L 2 L2 L2 L2 L2 L1 p ZA AOMDOAAAADANADN 20 13 14 a4 10 21 22 11 23 D 2a 25 L262 WD L218 ae L2K9 6 La 8 27 81 lar 2912 292 L3 4 J GD 62 6Gg8 2 34 L2 ow N TOP VIEW Y N N N a SSSSSSS USSSISNR aii IN j i S2 A Ieo IMPROVED TRAVEL VERSION WITHOUT FOR NPS 1 DN 25 FOR NPS 3 DN 80 INDICATOR DETAIL TRAVEL INDICATOR EZH SERIES EZH SERIES DETAIL VERSION ONLY VERSION ONLY NPS 1 THROUGH
66. sembly only Do not attempt to lift more weight than the regulator with these eyebolts Polyurethane PU Disk Conversion A new Polyurethane PU disk is being phased in during 2014 The new material offers improved durability in abrasive environments To convert EZH and EZHSO Series units currently in service the user will need to order three parts retainer key 31 disk assembly key 30 and seat ring key 2 Please contact your local Sales Office with any questions about parts selection Main Valve and Actuator Maintenance NPS 1 through 3 DN 25 through 80 Disk Maintenance Refer to Figures 8 and 9 For EZH Series 1 Remove nuts key 26 2 Carefully lift the upper actuator casing and lower actuator casing assembly keys 11 and 5 off the body key 1 3 Remove the hex socket cap screws key 33 and lock washers key 32 Lift off the disk holder assembly key 30 and disk retainer key 31 4 Remove the O ring key 29 Inspect the O ring for damage or wear and replace if necessary Lightly lubricate O ring before placing in the sleeve adaptor key 27 5 Remove the cage key 3 seat ring key 2 and O ring key 34 Inspect the O ring for damage or wear and replace if necessary Lightly lubricate O ring before placing in the body key 1 6 Set the seat ring key 2 back in the body key 1 with the curved side down and the seat edge up Place the cage key 3 on top of seat ring The cage will engage the
67. such as the spring key 1 washer key 3 plate key 4 filter net key 8 felt key 12 diaphragm key 18 spring washer key 20 and nut key 21 Remove and inspect O ring key 13 for damage or wear and replace if necessary Lightly lubricate the O ring before placing it back in the filter cover key 11 4 Clean filter net key 8 Replace felt key 12 5 Inspect diaphragm key 18 for damage or wear and replace if necessary Check the seating surface of the screw unit key 17 for erosion scratches spurs or other damage and replace if necessary 6 Unscrew and remove the regulator seat key 5 Inspect O ring key 6 for damage or wear and replace if necessary Lightly lubricate the O ring and place it on the regulator seat 7 Pull pad holder unit key 15 out of the body key 7 Inspect the seat for damage replace if necessary 8 Set the pad holder unit key 15 on the spring key 14 and insert the regulator seat key 5 Tighten the regulator seat until it stops 9 Lightly lubricate the outer and inner rims of the diaphragm key 18 Place the diaphragm onto the screw unit key 17 and slide the screw unit into the regulator seat key 5 Place plate key 4 washer key 3 and spring washer key 20 and screw nut key 21 into the screw unit Use care to avoid damage to parts when reassembling 10 Set the spring key 1 on top of the nut key 21 11 Align the regulator cover key 19 over the bod
68. sure drop and moisture in the gas use anti freeze practices such as heating the supply gas or adding a de icing agent to the supply gas 5 The PRX Series pilot connections are 1 4 NPT Connect a downstream control sense line from the A port on the bottom of the PRX Series pilot to a straight run of pipe 6 to 10 pipe diameters from the regulator outlet as shown in Figures 3 and 4 using 3 8 in 9 5 mm or larger outside diameter tubing If such a distance is not practical connect the control line away from elbows swages nipples or any area where abnormal flow velocities occur The PRX Series pilot connections are 1 4 NPT Connect a downstream bleed line from the S port on the PRX Series pilot with a straight run of pipe 6 to 10 pipe diameters to the regulator outlet as shown in Figures 3 and 4 using 3 8 in 9 5 mm or larger outside diameter tubing EZH and EZHSO Series Note Separate sensing lines must be used for the S and the A ports To prevent damage to the pilot during Startup the sense and bleed lines should be located on the same side of the downstream block valve 7 Install hand valves in the downstream sense and bleed lines if desired If hand valves are installed they should be full flow valves such as a full port ball valve For EZHSO Series installation a vent valve downstream of the regulator is needed It should be installed directly in the PRX Series pilot bleed line
69. the required flow to the downstream system Any excess loading pressure on the actuator diaphragm escapes downstream through the bleed restriction in the pilot When the gas demand in the downstream system has been satisfied the outlet pressure increases The increased pressure is transmitted through the downstream control line and acts on the pilot diaphragm This pressure exceeds the pilot spring setting and moves the PRX Series diaphragm closing the PRX Series orifice and interrupting the loading pressure supply to main valve actuator The excess of loading pressure acting on both the main diaphragm and PRX Series pilot bleeds to the downstream system through a bleed restriction in the pilot EZH and EZHSO Series A check valve is installed between outlet pressure and loading pressure impulse lines this valve will protect the diaphragm assembly from possible damage during startup limiting the differential between outlet and loading pressure EZHSO Series Spring to Open Version EZHSO Series Single Pilot Regulator The pilot operated EZHSO Series Spring to Open version will fail in open position with a main valve diaphragm failure or lack of pressure supply to the pilot see Table 3 for Failure Mode Analysis EZHSO Series Figure 4 uses inlet pressure as the operating medium which is reduced through pilot operation to load the regulator actuator diaphragm lower chamber The upper case of EZHSO Series actuator filled
70. using a stud to guide Note Rotate the upper casing such that the outer holes for sensing lines are perpendicular to gas flow and outer holes of lower casing Lubricate threads on bolts key 21 Bolt together the upper and lower actuator casings keys 11 and 5 using bolts key 21 washers key 22 and nuts key 23 See Torque Specifications Table 4 for proper torque Tighten cap screws using a star criss cross pattern for five times until proper specified torque is achieved Assemble one nut key 151 to the stem key 147 until the specified torque is achieved and then assemble another nut key 151 to lock the position of stem Screw on the closing cap key 146 Mount O ring key 75 on the cap key 70 If present set the stem key 139 through the casing hole and tap it into the groove in the diaphragm plate key 18 Slide the travel indicator fitting key 141 over the stem and tighten to the cap key 70 EZH and EZHSO Series TOP VIEW SNNNNNNII SN S mus L2 AS RAs RX LEGACY TRAVEL INDICATOR DETAIL P1766 APPLY LUBRICANT L SEALANT S L2 SILICONE BASED GREASE S2 ANAEROBIC METHACRYLATE SEALANT FOR THREADS 1 Lubricant and sealant must be selected such that they meet the temperature requirements TOP VIEW SS L2 SS RSs
71. y key 7 with the sense port V opposite the pilot supply port R 12 Place the felt key 12 and filter net key 8 one on each side of the felt on the filter cover key 11 13 Pick up the body key 7 and place it on the filter cover key 11 with the inlet port M aligned vertically with the sense port V 14 Insert cap screws key 2 Place washers key 9 and nuts key 10 on the end of the cap screws Tighten the nuts Parts Ordering Each EZH or EZHSO Series regulator is assigned a serial number which can be found on the nameplate Refer to the serial number when contacting your local Sales Office for technical information or when ordering parts When ordering replacement parts reference the key number of each needed part as found in the following parts list Separate kit containing all recommended spare parts is available EZH and EZHSO Series Parts List EZH and EZHSO Series Main Valve Figures 8 and 9 Key Description EZH Series Disk Parts Kits NPS 1 2 and 3 DN 25 50 and 80 include keys 29 30 32 33 34 and 62 NPS 4 DN 100 include keys 29 30 32 33 69 71 and 75 NPS 1 DN 25 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 2 DN 50 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 3 DN 80 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Polyurethane PU NPS 4 DN 100 Nitrile NBR and Fluorocarbon FKM
72. ype PRX 120 pilot to the intermediate pressure portion of piping using 3 8 in 9 5 mm or larger outside diameter tubing Startup and Adjustment Pre startup Considerations Each regulator is factory set for the outlet pressure specified on the order If no setting was specified outlet pressure was factory set at the mid range of the pilot control spring Before beginning the start up procedure in this section make sure the following conditions are in effect Block valves isolate the regulator Vent valves are closed A bypass if any is in operation In all cases check the pilot control spring setting to make sure it is correct for the application Be sure to slowly introduce pressure into the system to prevent downstream overpressure due to potential rapid pressure increase Pressure gauges should always be used to monitor downstream pressure during Startup Procedures used in putting this regulator into operation must be planned accordingly if the downstream system is pressurized by another regulator or by a manual bypass Note When using a Type SA 2 pilot supply filter regulator the differential pressure across the main regulator must be at least 45 psid 3 1 bar d for optimum regulator performance The Type SA 2 can be removed if differential pressure across the main regulator is less than 45 psid 3 1 bar d and inlet pressure stays at or below 200 psig 13 8 bar Pilot Adjustment For PRX Series pilots
73. zing cap key 70 Lubricate the sleeve key 14 in the upper plate contact area and assemble the diaphragm plates system on the sleeve system Tighten screws key 16 using a star criss cross pattern for five times until proper specified torque is achieved Screw the special screws key 68 already on the sleeve to fix the diaphragm plates system on the sleeve system See Torque Specifications 14 15 16 17 18 19 20 21 EZH and EZHSO Series Table 4 for proper torque values Tighten special screws key 68 using a star criss cross pattern until proper specified torque is achieved Lubricate lower casing key 5 on the diaphragm contact area Carefully insert the trim system into the sleeve guide key 61 Lubricate the diaphragm key 20 on the upper casing contact area Lubricate and mount the O ring key 69 on the cap key 70 Lubricate and mount O rings key 9 and anti friction rings key 8 inside the cap key 70 Lubricate and mount O ring key 153 on the stem key 147 Carefully place the cap on the upper actuator casing key 11 Align the travel indicator hole on the cap key 70 to the upper actuator casing travel indicator hole Screw 8 screws key 77 to tighten cap key 70 to the upper actuator casing key 11 Bag diaphragm flat to lower casing diaphragm flange contact area Carefully place the top actuator casing on the top of the lower actuator casing trim system

Emerson EZH and EZHSO Series Pressure Reducing Regulators Instruction Manual

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