Emerson 627F Instruction Manual
Contents
1. 1 Lubricants must be selected such that they meet the temperature requirements NLGI is the National Lubricating Grease Institute Figure 3 Type 627F Main Regulator Assembly 11 Type 627F 32B3797_D Industrial Regulators Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75069 1872 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 2 8 9 7 22 L gt 4 23 6 3 Figure 4 Type 6351F Pilot Assembly Natural Gas Technologies Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75069 1872 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 Gallardon 28320 France Tel 33 2 37 33 47 00 For further information visit www emersonprocess com regulators 44 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 31 287 Asia Pacifi2. Cap Aluminum 59 Elbow Plated steel optional 2 required 15A6002XW32 60 Pilot Supply Tubina Steel optional 35 Vent Assembly Type Y602X1 A12 IPP Y Suang opti 44 Restriction Carbon plated steel With Type P594 1 filter 0500213809W High Gain Without filter 0500213809W ee 61 Spring Seat Bolt Plated steel 12B3303X012 e ae an 62 Washer Plated steel 1B865928982 ciel 63 Closing Cap Gasket 12B1862X012 67 Drive Screw 2 required Aluminum 1A368228982 Ductile iron 1A368228982 Steel 1A368228982 Recommended Spare Parts 10 Part Number R6351X00012 1B7971X0322 25A6220X012 18B6542xX022 18B6542X042 18B6542X052 18B6542X062 20B9389X022 20B9389X062 1B797937022 1B7980000B2 1B7980000C2 1B7980X00A2 1B798525062 1B788327022 1K748527202 10B7192X012 1A946324122 10B6189X022 10488226232 AJ5004000A2 1H2369X0012 27A5516X012 17A7279X012 17A2029X012 17A7277X012 Type 627F Zao e Ka i e DA o nm gt ge lt LN 15 va ES 1 OOOHOO O APPLY LUBRICANT L1 MULTI PURPOSE NLGI GRADE 1 GREASE L2 ANTI SEIZE COMPOUND
3. Type 627F Actuator 2 Orifice 25 34 Cap Screw with aluminum diaphragm casing 16 22 Cap Screw with ductile iron or steel diaphragm casing 25 34 18 Cap Screw Lever 7 9 5 36 Closing Cap 40 54 Spring Case Cap Screw with aluminum or ductile iron diaphragm casing 7 9 5 x Spring Case Cap Screw with steel diaphragm casing 35 47 53 Spring Retainer 3 4 1 54 Diaphragm Connector 7 9 5 Type 6351F Pilot 3 Body Plug 6 8 1 12 Machine Screw 3 4 1 1 Refer to Figures 3 and 4 for key number locations Note Always use a pressure gauge to monitor pressure when making adjustments Shutdown To avoid personal injury property damage due to explosion or damage to regulator or downstream components during shutdown release downstream pressure to prevent an overpressure condition on the diaphragm of the regulator 1 Close the upstream shutoff valves to the pilot and regulator inlets 2 Close the downstream shutoff valves to the pilot sense connection and the regulator outlet 3 Slowly open the vent valve on the downstream side of the regulator to vent all pressures Maintenance Due to normal wear damage from external sources or debris in the air or gas line regulator parts such as the disk assembly orifice and diaphragm must be inspected periodically and replaced as necessary to ensure correct performance The frequency of inspection and replacement depends upon the severity of conditions and the requirements of appli
4. also requires inlet pressure to be piped to the pilot supply connection see Figure 2 If the optional factory pilot supply piping was not selected run a 3 8 inch 9 5 mm outer diameter or larger supply line from the upstream pipeline or from the 1 4 NPT body tap ductile iron body only to the pilot inlet connection marked in Do not make the upstream pipeline connection in a turbulent area such as near a nipple swage or elbow To properly isolate the regulator install a hand valve in the pilot supply line and provide vent valves to relieve pressure from the regulator Overpressure Protection Personal injury property damage equipment damage or leakage due to escaping gas or bursting of pressure containing parts may result if this regulator is overpressured or is installed where service conditions could exceed the limits given in Specifications section or where conditions exceed any ratings of the adjacent piping or piping connections To avoid such injury or damage provide pressure relieving or pressure limiting devices as required by the appropriate code regulation or standard to prevent service conditions from exceeding limits Type 627F Additionally physical damage to the regulator could cause personal injury or property damage due to escaping gas To avoid such injury or damage install the regulator in a safe location Startup and Adjustment Startup To avoid personal injury or property damag
5. application Place the nameplate key 39 over the screw holes insert the spring case cap screws key 37 and finger tighten 14 Install the locknut key 34 and hold the spring seat bolt key 61 to prevent turning by running the locknut all the way down the threads and tighten as shown in Figure 3 Install the closing cap gasket key 63 Apply lubricant to the threads on top of the spring case key 29 and install the closing cap key 36 15 Using a crisscross pattern finish tightening the spring case cap screws key 37 see Figure 3 Pilot These procedures are for gaining access to the Type 6351F pilot trim and diaphragm parts All pressure must be released from the regulator and pilot before the following steps can be performed Refer to Figure 4 for key number locations Trim Parts 1 Remove the body plug key 3 and the valve spring key 6 and inner valve assembly key 4 from the body 2 Inspect the removed parts and body plug gasket key 23 replace as necessary and make sure the plug seating surfaces are free from debris 3 Sparingly apply lubricant to the body plug gasket key 23 and the threads of the body plug key 3 Install the body plug gasket over the body plug 4 Install the plug spring key 6 and inner valve assembly key 4 into the body key 1 Torque the body plug key 3 to 6 foot pounds 8 1 Nem Diaphragm Parts 1 Remove the closing cap key 28 loosen the locknut key
6. 11 and back out the adjusting screw key 10 to remove control spring key 9 compression Remove the machine screws key 12 and separate the spring case key 2 from the body assembly key 1 Remove the control spring key 9 Remove the diaphragm assembly key 7 and inspect the removed parts and replace as necessary Make sure the restriction hole key 44 is free from debris Install the diaphragm assembly key 7 and push down on it to see if the inner valve assembly key 4 strokes smoothly and approximately 1 16 inch 2 0 mm Note In step 5 if installing a control spring of a different range from the one that was removed be sure to replace the spring range originally appearing on the spring case with the new spring range Stack the control spring key 9 and control spring seat key 8 onto the diaphragm assembly key 7 Sparingly apply lubricant to the control spring seat Install the spring case key 2 on the body key 1 with the vent key 35 oriented to prevent clogging or entrance of moisture Install the machine screws key 12 and using a crisscross pattern torque them to 3 foot pounds 4 1 Nem When all Maintenance is complete refer to the Startup and Adjustment section to put the regulator back into operation and adjust the pressure setting Tighten the locknut key 11 and install the closing cap key 28 Parts Ordering When corresponding with your local Sales Office or representativ
7. 25 or 50 CL150 RF CL300 RF CL600 RF PN 16 25 40 RF Flanged Minimum Pressure Differential 20 psid 1 4 bar d Maximum Inlet and Differential Pressures See Table 2 Maximum Emergency Outlet Pressure 250 psig 17 2 bar for all Type 627F actuators and Type 6351F pilot components Outlet Pressure Ranges 5 to 100 psig 0 34 to 6 9 bar See Table 1 Orifice Sizes 3 8 x 1 8 3 8 x 1 4 3 8 or 1 2 inch 9 5 x 3 2 9 5 x 6 4 9 5 or 13 mm Temperature Capabilities 20 to 180 F 29 to 82 C Flow Coefficients See Table 4 IEC Sizing Coefficients See Table 5 Pressure Registration External Pilot Supply Connection 1 4 NPT Pilot Sense Connection 1 4 NPT Body Tap Connection 1 4 NPT ductile iron body only Approximate Weights NPT body with Ductile iron or steel casings 10 pounds 4 kg NPT body with aluminum casings 6 3 pounds 3 kg Flanged body with steel casings 18 pounds 8 kg Flanged body with Ductile iron casings 14 pounds 6 kg 1 The pressure temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded Table 1 Outlet Pressure Ranges PILOT CONTROL SPRING INFORMATION OUTLET PRESSURE RANGE PILOT TYPE Wire Diameter Free Length Part Number Color Code psig bar inches mm inches mm 6351F 5 to 35 0 34 to 2 4 1B788327022 Unpainted 0 142 3 61 2 13 54 1 35 to 100 2 4 to 6 9 1K748527022 R
8. 5to250 5 9 to 17 2 125 to 250 8 6 to 17 2 3 8 9 5 30 to 250 2 1 to 17 2 55to250 3 8 to 17 2 65to250 4 5 to 17 2 85to250 5 9 to 17 2 125 to 250 8 6 to 17 2 1 2 13 25 to 125 1 7 to 8 6 50 to 125 3 4 to 8 6 60 to 125 4 1 to 8 6 80 to 125 5 9 to 8 6 120 to 125 8 3 to 8 6 1 For best performance outlet pressure setting should be made using an inlet pressure that is midway between the highest and lowest expected inlet pressure Description repositions the valve disk to provide fast response to f system changes Simultaneously the pilot amplifies The Type 627F pilot operated Type 6351F pilot system pressure changes to position the main pressure reducing regulator Figure 1 provides regulator valve disk for precise pressure control economical accurate pressure control in a wide variety of applications using pressure factor measurement Inlet pressure is used for the pilot supply pressure fixed factor billing The regulator can be used with If downstream flow increases lowering the outlet natural gas air or a variety of other gases pressure below the regulator setpoint pressure on the pilot diaphragm and the lever side of the main regulator diaphragm decreases The pilot opens to Principle of Operation supply the required loading pressure increase The increased loading pressure from the pilot overcomes the main regulator spring force and the main regulator valve disk m
9. Instruction Manual Form 5282 April 2012 Type 627F Pilot Operated Pressure Reducing Regu W5607 Type 627F lator Figure 1 Type 627F Pilot Operated Pressure Reducing Regulators 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 Regulator Technologies 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 Introduction Scope of the Manual This manual provides instructions for installation adjustment maintenance and parts ordering information for the Type 627F regulator 4 EMERSON Process Management D101545X012 Type 627F Specifications The Specifications section gives some general specifications for the Type 627F regulator The nameplates give detailed information for a particular regulator as it comes from the factory Body Sizes and End Connection Styles Ductile iron 3 4 1 or 2 NPT Steel 3 4 1 or 2 NPT NPS 1 or 2 DN
10. Ring Nitrile NBR Stem Backup Ring Polytetrafluoroethylene PTFE 2 required Hairpin Clip Stainless steel Drive Pin Plated steel Lever Plated steel Lever Retainer Plated steel Lever Pin Stainless steel Lever Cap Screw Plated steel 2 required Pusher Post Aluminum Drive Pin Stainless steel Part Number R627FX00A12 R627FX00S12 12B3307X012 12B3307X022 12B3308X012 30B3050X012 30B3051X012 30B7452x012 43B8656X022 44B0666X012 41B8978xX012 41B8080X012 40B6754xX012 40B6756xX012 44B0386xX012 44B3342X012 12B4986X012 12B4986X022 0B042209012 1A928809012 12B4986X032 12B4986X042 0B042235032 1A928835032 1A352524052 1A560724052 1A560724052 17A2325X022 40B3084xX012 30B3053X012 30B3104X012 22B4767X012 1E547706992 20B3061X012 104248X0212 104248X0202 10B3059X012 1D687506992 1K786806992 10B3058X012 1H3671X0012 20B3063X012 30B3097X012 10B3083X012 10B7454X012 20B3064X012 14B0382X012 Type 627F TYPE 627F ACTUATOR N TYPE 6351F Z PILOT 42B1863 D OPTIONAL PILOT SUPPLY TUBING Figure 3 Type 627F Main Regulator Assembly continued Type 627F Main Regulator Figure 3 Type 6351F Pilot Figure 4 continued Key Description Key Description Part Number Parts Kit included are keys 4 6 7 and 23 23 Diaphragm Nitrile NBR 1 Body Assembly Stainless Steel Aluminum or Ductile
11. as may accumulate and cause personal injury death or property damage due to fire or explosion Vent a regulator in hazardous gas service to a remote safe location away from air intakes or any hazardous area The vent line or stack opening must be protected against condensation or clogging To keep the pilot spring case vent from being plugged or the spring case from collecting moisture or other foreign material point the vent down or otherwise protect it To change vent orientation remove the spring case and remount it on the pilot body To remotely vent the pilot remove the vent and install obstruction free tubing or piping into the 1 4 NPT vent tapping Provide protection on a remote vent by installing a screened vent cap into the remote end of the vent pipe If the regulator requires repositioning refer to the Body Area Maintenance procedures and or the Diaphragm Case Area Maintenance procedures in the Maintenance section to reposition the regulator for the application The Type 627F regulator requires a downstream control line Install the control line before putting the regulator into operation Ensure that the downstream control line piping is at least 3 8 inch 9 5 mm or larger outside diameter tubing and connected to a straight section of outlet piping several pipe diameters downstream of the regulator Connect the other end of the control line to the pilot side connection marked sense The Type 627F regulator
12. c 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 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 product remains solely with the purchaser Emerson Process Management Regulator Technologies Inc 2002 2012 All Rights Reserved
13. cable laws Normal wear of the orifice and disk assembly is accelerated with high pressure drops and with impurities in the flow stream Due to the care Regulator Technologies takes in meeting all manufacturing requirements heat treating dimensional tolerances etc use only replacement parts manufactured or furnished by Fisher Instructions are given below for replacing the disk assembly orifice diaphragm and O rings These procedures may also be used for disassembly required for inspection and replacement of other parts Body Area Maintenance Procedures Isolate the regulator from all pressure to avoid personal injury and equipment damage due to explosion or sudden release of process pressure Cautiously release all pressure from the regulator before attempting disassembly The disk assembly and orifice can be inspected removed and replaced without removing the regulator body from the line connections If the disk assembly and orifice are not damaged refer to the Diaphragm and Spring Case Area Maintenance procedures in this section These procedures are for gaining access to the disk assembly orifice diaphragm casing O ring and stem assembly All pressure must be released from the regulator before the following steps can be performed Refer to Figure 3 for key number locations Replacing the Disk Assembly or Orifice If it is necessary to perform maintenance on the disk assembly key 9 or orifice key 2 conti
14. e about this regulator reference the type number which is found on the nameplate 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 Recommended Spare Parts Type 627F Parts List Type 627F Main Regulator Figure 3 Key 2 7 9 10 alata 12 13 14 15 16 17 18 19A 19B Description Type 627F Parts Kit includes keys 4 7 9 11 12 13 23 55 and 63 Aluminum or Ductile iron casing Stainless steel casing Body Ductile iron 3 4 NPT 1 NPT 2 NPT Steel 3 4 NPT 1 NPT 2 NPT Steel CL150 RF Flanged NPS 1 DN 25 NPS 2 DN 50 Steel CL300 RF Flanged NPS 1 DN 25 NPS 2 DN 50 Steel CL600 RF Flanged NPS 1 DN 25 NPS 2 DN 50 Steel PN 16 25 40 RF Flanged NPS 1 DN 25 NPS 2 DN 50 Orifice Aluminum 3 8 x 1 8 inch 9 5 x 3 2 mm 3 8 x 1 4 inch 9 5 x 6 4 mm 3 8 inch 9 5 mm 1 2 inch 13 mm Stainless steel 3 8 x 1 8 inch 9 5 x 3 2 mm 3 8 x 1 4 inch 9 5 x 6 4 mm 3 8 inch 9 5 mm 1 2 inch 13 mm Cap Screw 2 required Aluminum Ductile iron Steel Diaphragm Case O Ring Nitrile NBR Diaphragm Case Aluminum Ductile iron Steel Boost Body Aluminum O Ring Nitrile NBR Stem Guide Powdered metal Disk Assembly for all orifice sizes Aluminum holder and Nitrile NBR disk 303 Stainless steel holder and Nitrile NBR disk Stem 416 Stainless steel Stem O
15. e due to explosion or damage to regulator or downstream components during startup release downstream pressure to prevent an overpressure condition on the diaphragm of the regulator In order to avoid an overpressure condition and possible equipment damage pressure gauges should always be used to monitor pressures during startup 1 Slowly open the upstream shutoff valves to the pilot and the regulator inlet 2 Slowly open the downstream shutoff valves to the pilot sense connection and the regulator outlet 3 Check all connections for leaks 4 Make final pilot control spring adjustments according to the Adjustment procedures Standard factory setpoint is approximately mid range of the pilot spring range Adjustment The range of allowable pressure settings is marked on the pilot If a pressure setting beyond this range is necessary substitute the appropriate pilot control spring Change the pilot stamping to indicate the new pressure range The only adjustment necessary on a Type 627F regulator is the pressure setting of the pilot control spring Turning the pilot adjusting screw clockwise into the spring case increases the spring compression and pressure setting Turning the pilot adjusting screw counterclockwise decreases the spring compression and pressure setting Type 627F Table 6 Recommended Torque Values KEY NUMBER DESCRIPTION FOOT POUNDS NEWTON METERS
16. ed 0 192 4 88 2 19 55 6 Table 2 Maximum Allowable Inlet Pressures and Pressure Differential ORIFICE SIZE MAXIMUM INLET PRESSURE MAXIMUM PRESSURE DIFFERENTIAL inch mm psig bar psig bar 3 8 x 1 8 9 5x 3 2 250 17 2 250 17 2 3 8 x 1 4 9 5 x 6 3 250 17 2 250 17 2 3 8 9 5 250 17 2 250 17 2 1 2 13 125 8 6 125 8 6 Type 627F FIELD INSTALLED DOWNSTREAM CONTROL LINE SPRING SEAT BOLT THIS IS NOT AN ADJUSTING SCREW RESTRICTION BLEED FILTER FACTORY INSTALLATION OPTIONAL TENSION SPRING MAIN REGULATOR DIAPHRAGM PILOT DIAPHRAGM LEVER PILOT ADJUSTING SCREW TYPE 6351F PILOT VALVE DISK TYPE 627F REGULATOR A6558 Gilg INLET PRESSURE E OUTLET PRESSURE ATMOSPHERIC PRESSURE PILOT SUPPLY TUBING LOADING PRESSURE FACTORY INSTALLATION OPTIONAL Figure 2 Type 627F Pilot Operated Pressure Reducing Regulator Operational Schematic Table 3 Additional Specifications ALLOWABLE INLET PRESSURE RANGE FOR MAINTAINING OUTLET PRESSURE ORIFICE SIZE WITHIN 1 OF THE ABSOLUTE OUTLET PRESSURE SETTING 5 psig 0 34 bar 30 psig 2 1 bar 40 psig 2 8 bar 60 psig 4 1 bar 100 psig 6 9 bar inch mm psig bar psig bar psig bar psig bar psig bar 3 8 x 1 8 9 5x 3 2 30 to 250 2 1 to 17 2 55to250 3 8 to 17 2 65to250 4 5to17 2 85to 250 5 9 to 17 2 125 to 250 8 6 to 17 2 3 8 x 1 4 9 5 x 6 4 30 to 250 2 1 to 17 2 55to250 3 8 to 17 2 65to250 4 5 to 17 2 8
17. g pressure bleeds through the pilot restriction to the downstream system until the loading pressure and outlet pressure equalize The main valve is closed by the spring and the bleed stops Installation Only personnel qualified through training and experience should install operate or maintain this regulator Regulator operation within ratings does not preclude the possibility of damage from debris in the lines or from external sources Key numbers referenced in this section are shown in Figures 3 and 4 1 A regulator should be inspected for damage periodically and after any overpressure condition 2 Ensure that the operating temperature capabilities listed in the Specifications section are not exceeded 3 A pressure relieving or pressure limiting device must be provided by the user if the inlet pressure can exceed the outlet pressure rating of the downstream equipment 4 Make sure that there is no damage to or foreign material in the regulator Ensure that all tubing and piping have been blown free of foreign debris 5 The regulator may be installed in any position as long as the flow through the body is in the direction indicated by the arrow cast on the body and both pilot openings are connected 6 If continuous operation is required during inspection or maintenance install a three valve bypass around the regulator A regulator may vent some gas to the atmosphere In hazardous or flammable gas service vented g
18. iron diaphragm case 10B3069X012 2 Spring Case Aluminum Steel diaphragm case 10B8735X012 3 Body Plug Assembly 24 Diaphragm Head Plated steel 1D666428982 Aluminum Nitrile NBR 29 Spring Case Aluminum Fluorocarbon FKM Aluminum 40B3086X012 Stainless steel Nitrile NBR Ductile iron 30B3055x012 Stainless steel Fluorocarbon FKM Steel 30B3102X012 4 Inner Valve Plug 31 Lower Spring Seat Plated steel 1D666625072 Stainless steel Nitrile NBR 32 Tension Spring Plated steel 12B3306X012 Stainless steel Fluorocarbon FKM 34 Locknut Plated steel 1E944024112 6 Valve spring Steel 36 Closing Cap 7 Diaphragm Assembly Brass 1 543314012 Aluminum Nitrile NBR Aluminum 1E5433X0012 Aluminum Fluorocarbon FKM Stainless steel 1E5433X0022 Aluminum Nitrile NBR 37 Spring Case Cap Screw 8 required 8 Upper Spring Seat Plated steel Aluminum 1A391724052 9 Control Spring Plated steel spring wire Ductile iron 14391724052 5 to 35 psig 0 34 to 2 4 bar Unpainted Steel 1A368324052 35 to 100 psig 2 4 to 6 9 bar Red 39 Nameplate rrr 10 Adjusting Screw Plated steel 53 Spring Retainer Plated steel 1H855224102 11 Locknut Zinc plated steel 54 Diaphragm Connection Plated steel 12B3301X012 12 Machine Screw Carbon steel 6 required 55 Gasket Nylon PA 12B3302X012 foes ie 56 Reducing Nipple Plated steel 12B4987X012 22 Pipe Nipple Galvanized plated steel 24 Filter Type P594 1 optional 58 Pipe Plug Steel 1A767524662 A R 28 Closing
19. nue with the following steps 1 Remove the closing cap key 36 and loosen the lock nut key 34 relieving tension spring pressure Hold the spring seat bolt key 61 to prevent turning of the bolt from the tension spring key 32 Remove the cap screws key 3 and separate the diaphragm casing key 5 from the body key 1 Note If the body cap screws key 3 are evenly removed and replaced very carefully then the tension spring force will not need to be released 2 Inspect and if necessary remove the orifice key 2 If removed coat the threads of the replacement orifice with lubricant and torque to 25 foot pounds 34 Nem 3 Inspect the disk assembly and if necessary remove the hairpin clip key 13 that holds the disk assembly key 9 in place If replacing the disk assembly is the only maintenance required refer to the Startup procedure Replacing the Stem Assembly If it is necessary to perform maintenance on the stem assembly continue with the following steps 1 Remove the boost body key 6 O ring key 7 and stem guide key 8 from the diaphragm casing key 5 Unhook the stem key 10 from the lever key 15 and remove from the diaphragm casing key 5 2 Remove and inspect the diaphragm casing O ring key 4 and stem O ring key 11 replace if necessary 3 Install the replacement diaphragm casing O ring key 4 onto the boost body key 6 Apply lubricant to the stem O ring and install on the s
20. oves farther open to supply the required flow The superior performance of a Type 627F regulator is due to the amplifying effect of the pilot and the two path control system Figure 2 Changes in outlet pressure act quickly on the main regulator diaphragm which Type 627F Table 4 Flow Coefficients 3 4 NPT BODY NPS 1 DN 25 BODY NPS 2 DN 50 BODY ORIFICE SIZE Wide Open Wide Open Wide Open Wide Open Wide Open Wide Open inches mm c C 1 c C i c C 1 3 8 x 1 8 9 5 x 3 2 12 5 0 43 29 1 12 5 0 43 29 4 12 5 0 43 29 2 3 8 x 1 4 9 5 x 6 4 50 1 63 30 6 50 1 71 29 3 52 1 66 31 3 3 8 9 5 108 2 99 36 1 108 3 42 31 6 11 5 3 39 33 9 1 2 13 190 4 87 39 0 190 5 29 35 9 200 5 01 39 9 Table 5 IEC Sizing Coefficients ORIFICE SIZE X r 7 inches mm 3 4 NPT Body NPS 1 DN 25 Body NPS 2 DN 50 Body gt 1 8 3 2 0 54 0 55 0 54 0 79 1 4 6 4 0 59 0 54 0 62 0 87 3 8 9 5 0 82 0 63 0 73 aia 0 89 1 2 13 0 96 0 82 1 01 0 86 When downstream pressure increases due to lowered demand greater pressure is registered on the pilot diaphragm and the lever side of the main regulator diaphragm The pilot closes and the excess loading pressure bleeds off to downstream through the pilot restriction With the lower loading pressure the spring can move the main regulator disk closer to the orifice Under no flow conditions the excess loadin
21. remove the closing cap key 36 the lock nut key 34 and washer key 62 Hold the spring seat bolt key 61 to prevent turning of the bolt from the tension spring key 32 2 Remove the spring case cap screws key 37 the nameplates and lift off the spring case key 29 If changing the tension spring key 32 or repositioning the spring case key 29 is the only maintenance required remove the spring seat bolt key 61 from the tension spring key 32 and unscrew the spring retainer key 53 Install the replacement tension spring Install left hand threaded end of spring Type 627F 10 11 seat bolt key 61 into tension spring key 32 until the spring is flush with the top of the bolt threads as shown in Figure 3 Rotate the spring case so it is correct for the application Skip to step 14 For Diaphragm Area Maintenance continue with step 3 Remove the diaphragm assembly by tilting it so that the pusher post key 19 slips off the lever key 15 If itis necessary to replace the lever assembly remove the lever cap screws key 18 Install the replacement lever key 15 into the lever retainer key 16 by inserting the lever pin key 17 Secure the lever into the diaphragm casing with the cap screws key 18 and torque the cap screws to 7 foot pounds 9 5 Nem If it is necessary to perform maintenance on the diaphragm assembly continue with steps 6 through 15 Unscrew the diaphragm connector ke
22. tem key 10 Type 627F 4 Apply lubricant to the stem key 10 and insert the stem into the diaphragm casing key 5 and hook it on the lever key 15 5 Apply lubricant to the O ring key 7 and insert parts removed in steps 1 and 2 into the diaphragm casing key 5 6 Install the disk assembly key 9 line up the hole in the disk assembly and stem keys 9 and 10 and insert the hairpin clip key 13 7 Position the diaphragm casing plus attached parts in relation to the body key 1 so that they are correct for the application 8 Secure the diaphragm casing to the body with the cap screws key 3 For an aluminum diaphragm casing key 5 torque the cap screws key 3 to 16 foot pounds 22 Nem For ductile iron or steel diaphragm casings torque the cap screws key 3 to 25 foot pounds 34 Nem Torque the two body cap screws key 3 very evenly to square up the orifice key 2 and disk assembly key 9 seating relationship 9 It may be necessary to reposition the diaphragm spring case to prevent rain ice and foreign debris from entering the pilot spring case through the vent Diaphragm and Spring Case Area Maintenance Procedures These procedures are for gaining access to the tension spring diaphragm assembly and lever assembly All spring pressure must be released from the diaphragm casing before these steps can be performed Refer to Figure 3 for key number locations 1 To release the tension spring force
23. y 54 and remove the lower spring seat key 31 Separate the diaphragm key 23 from the diaphragm head key 24 gasket key 55 and the pusher post key 19 Install the diaphragm key 23 in reverse order in step 6 apply lubricant to the threads of the diaphragm connector key 54 and finger tighten Hook the pusher post on the lever key 15 then turn the diaphragm key 23 to match the holes in the diaphragm with the holes in the spring casing Unhook the pusher post from the lever hold the pusher post and torque the diaphragm connector key 54 to 7 foot pounds 9 5 Nem Apply lubricant to the pusher post key 19 then hook the pusher post on the lever key 15 and check the hole alignment If necessary loosen the diaphragm connector key 54 and reposition the diaphragm key 23 on the pusher post key 19 Tighten the diaphragm using 7 foot pounds 9 5 Nem of torque To change the tension spring remove the spring seat bolt key 61 from the tension spring key 32 and unscrew the spring retainer key 53 12 Install the tension spring key 32 on the lower spring seat key 31 insert and tighten the spring retainer key 53 Install the tension spring on the spring seat bolt key 61 until the spring is flush with the top of the bolt threads as shown in Figure 3 13 Install the spring case key 29 over the spring seat bolt and so that the pilot assembly will be in the correct position for the
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