Emerson LR128 Instruction Manual
Contents
1. Figure 8 Type LR128 Nameplate and Flow Arrow Figure 10 Type LR128 Cage O ring Placement Type LR128 TOP PLUG KEY 5 EY O RING KEY 14 a Yee O RING KEY 70 DIAPHRAGM KEY 9 oY BOTTOM PLUG KEY 11 19B2408 O RING KEY 10 LOCK WASHER KEY 130 SOCKET HEAD SCREW KEY 129 Figure 9 Type LR128 1 in DN 25 Diaphragm Assembly 19 48B2142_C 2 3 AND 4 IN 3 _ lt gt DN 50 80 AND 100 BODY SIZES Figure 11 Type LR128 Travel Indicator Plug Option Table 9 Type LR128 Torque Values BODY SIZE CAP SCREWS KEY 3 OR re dean cach INDICATOR FITTING OR HEX NUTS KEY 47 KEY 129 1 IN DN 25 ONLY INDICATOR PLUG KEY 19 In DN Ft lbs Nem 1 25 75 to 95 102 to 129 4106 5 5108 90 to 160 122 to 217 2 50 55 to 70 75 to 95 10 to 14 14 to 19 90 to 160 122 to 217 3 80 100 to 130 136 to 176 32 to 40 44 to 54 200 to 300 271 to 407 4 100 160 to 210 217 to 285 32 to 40 44 to 54 200 to 300 271 to 407 15 Type LR128 BOTTOM PLUG KEY 11 FLANGED NUT KEY 13 1 aa 0 amp 4 O RING KEY 10 W7394 KEY 9 DIAPHRAGM TOP PLUG O RING KEY 14 TOP PLUG KEY 5 KEY 70 Figure 12 Diaphragm and Plug Assembly Components Diaphragm a2. ad Figure 18 Standard Type LR128 with Type MR98H Pilot and Type 112 Restrictor 22 Type LR128 TYPE 112 RESTRICTOR TYPE MR98H PILOT Figure 19 Type LR128 with Type MR98H Pilot and Type 112 Restrictor with Pre piped Pilot Supply 23 Type LR128 Parts List Main Valve Figures 6 to 13 Key Description N Parts Kits Part Number Diaphragm Cartridge and O rings Included are keys 5 6 8 9 10 11 13 14 16 18 28 70 129 and 130 1 in DN 25 17E68 Nitrile NBR 17E97 Nitrile NBR 17E88 Fluorocarbon FKM 2 in DN 50 17E68 Nitrile NBR 17E97 Nitrile NBR 17E88 Fluorocarbon FKM 3 in DN 80 17E68 Nitrile NBR 17E97 Nitrile NBR 17E88 Fluorocarbon FKM 4 in DN 100 17E68 Nitrile NBR 17E97 Nitrile NBR 17E88 Fluorocarbon FKM Valve Body Bonnet Assembly 1 in DN 25 body Steel Stainless steel 2 in DN 50 body Steel Stainless steel 3 in DN 80 body Steel Stainless steel 4 in DN 100 body Steel Stainless steel Cap Screw For Steel Bonnet 1 in DN 25 body 4 required 2 in DN 50 body 8 required 3 in DN 80 body 8 required 4 in DN 100 body 8 required Hex Nut For bodies wi
3. 9 Tighten flanged nut key 13 to proper torque see Table 9 10 Completely reassemble the unit according to the assembly procedures provided on page 12 Travel Indicator Assembly Maintenance Travel indicator assembly key numbers are referenced in Figures 7 11 and 13 The indicator assembly can be removed and installed without removing the bonnet key 2 from the body key 1 Travel indicator maintenance is performed for two reasons a When damaged or worn parts need replacing b When travel indicator is removed and replaced with a travel indicator plug assembly INDICATOR FITTING INDICATOR COVER KEY 19 HEX NUTS 1 KEY 4 KEY 21 aes 11 O RING KEY 6 w7400_1 INDICATOR WASHER KEY 20 O RING KEY 18 OOOO INDICATOR Type 128 MAIN SPRING me UPPER SPRING SEAT KEY 17 INDICATOR STEM BACK UP RINGS KEY 16 Figure 13 Travel Indicator Parts Avoid personal injury or damage to property from sudden release of pressure or uncontrolled process fluid Before starting to disassemble carefully release all pressures according to the shutdown procedure Use gauges to monitor inlet loading and outlet pressures while releasing these pressures Remove the indicator protector key 22 Figure 7 and indicator cover key 21 2 Remove the first hex nut key 4 and the indicator washer key 20 Unscrew but do not completely remove the second he
4. 375 psig 10 3 to 25 9 bar spring Steel Stainless steel Pusher Post 416 Stainless steel Control Spring 25 to 75 psig 1 7 to 5 2 bar Powder coated steel Green 70 to 140 psig 4 8 to 9 7 bar Powder coated steel Red 130 to 200 psig 9 0 to 13 8 bar Powder coated steel Blue 150 to 375 psig 10 3 to 25 9 bar Powder coated steel Unpainted Diaphragm Neoprene CR Fluorocarbon FKM 2 required Nameplate Adjusting Screw Use with all other springs Use with 150 to 375 psig 10 3 to 25 9 bar spring Cap Screw 8 required Steel Stainless steel Jam Nut Steel Stainless steel Recommended spare part Part Number RMR98HX0052 RMR98HX0022 ERAA01934A1 ERAA01934A3 ERAA01886A0 ERAA01886A1 ERCA00619A0 ERCA00619A2 GF04841X022 ERCA01305A0 GF05532X022 GF05534X022 1L339708012 1L3397X0012 1N943024272 10943060012 ERCA00823A0 ERCA00823A1 ERCA00430A0 ERCA00430A1 ERCA01344A0 ERAA01910A0 ERAA01911A0 ERAA02889A0 1N943427142 ERCA00512A0 ERCA00512A1 GF05553X012 ERAA02340A0 ERCA00100A0 ERCA00100A1 ERCA00380A0 ERCA00380A1 55 58 59 63 Type LR128 Description Drive Screw 4 required Lock Washer Zinc plated Carbon steel Machine Screw 18 8 Stainless steel O ring Retainer 416 Stainless steel Lock Washer Steel Stainless steel Gasket Composition Locknut Steel Vent Type Y602 12 Valve Plug Sealing O ring Nitrile NBR Fluorocarbon FKM Spacer Zinc plated steel Use wit
5. GE10588X012 SWE GE10682X012 CL150 RF GE10676X012 WCC Steel CL300 RF GE10678X012 CL600 RF GE10679X012 PN 16 25 40 RF GE12898X012 3 NPT GE10588X022 CL150 RF GE10676X022 CF8M Stainless steel CL300 RF GE10678X022 CL600 RF GE10679X022 PN 16 25 40 RF GE12898X022 CF3M Stainless steel CL150 RF GE10676X042 CL150 RF GE10699X012 CL300 RF GE10700X012 WCC Steel CL600 RF GE10701X012 PN 16 25 40 RF GE13594X012 3 R CL150 RF GE10699X022 CL300 RF GE10700X022 CF8M Stainless steel CL600 RF GE10701X022 PN 16 25 40 RF GE13594X022 CL150 RF GE10835X012 WCC Steel CL300 RF GE10839X012 CL600 RF GE10842X012 4 100 CL150 RF GE10835X022 CF8M Stainless steel CL300 RF GE10839X022 CL600 RF GE10842X022 25 Type LR128 Parts List Main Valve Figures 6 to 13 continued Key 11 12 13 14 15 16 17 18 19 19 20 21 22 Description Bottom Plug Stainless steel 1 in DN 25 body 2 in DN 50 body 3 in DN 80 body 4 in DN 100 body Main Valve Spring Stainless steel 1 in DN 25 body Black and Yellow 2 in DN 50 body Green and White 3 in DN 80 body Light Blue and White 4 in DN 100 body Green and White Flanged Hex Nut Stainless steel 2 in DN 50 body 3 and 4 in DN 80 and 100 bodies Top Plug O ring 1 and 2 in DN 25 and 50 bodies Nitrile NBR Fluorocarbon FKM 3 and 4 in DN 80 and 100 bodies Nitrile NBR Fluorocarbon FKM Stem Stainless steel For bodies with
6. diaphragm damage proper control line connection and make sure control line hand valve if used is open Check for correct main valve sizing clogged main valve inlet strainer Inlet pressure rises higher than expected restrictive inlet or outlet piping plugged or restricted control line proper control line location should not be installed in or directly downstream of an elbow or swage proper springs in the main valve and pilot Check for Unit response gets slower and performance mineral deposits or sediment buildup inside the spaces of the restrictor starts to decrease debris clogging the gaps inside the restrictor clogged pilot supply filter strainer 11 Type LR128 Disassembly Disassembly of Type LR128 1 Shutdown isolate and depressurize the main valve and pilot according to the shutdown procedure 2 Remove the cap screws key 3 Lift up and remove the bonnet key 2 from the body key 1 Provide adequate support to the bonnet when disassembling Type LR128 relief valve or backpressure regulator installed in a vertical installation or other application where the bonnet is not oriented upward Without adequate support the bonnet may fall and cause physical injury when the cap screws are loosened 3 Remove the diaphragm key 9 and plug key 11 assembly and bonnet O ring key 28 4 Pull out the cage key 7 O ring key 8 and inlet strainer key 23 5 Clean parts an
7. for better accuracy The 8 position has the largest flow is most stable and easiest for startup The 0 setting has the smallest minimum flow passage at no point of rotation will the Type 112 restrictor be completely shut off Note Mineral dirt and sediments may gradually deposit and build up inside the spaces of the restrictor This may cause the unit response to get slower and unit performance to decrease If clogging of the restrictor is suspected immediately check and clean the restrictor Regular inspection of the restrictor is recommended to ensure optimum performance Refer to the Type 112 Restrictor Maintenance section Likewise debris in the process fluid may clog the restrictor Install strainer upstream of the regulator to prevent debris from clogging the restrictor Regular inspection maintenance and cleaning of the strainer is recommended to ensure optimum performance Recommended Type 112 Restrictor Settings and Restrictor Setting Guide Table 4 and Figure 5 This guide can be used to adjust performance according to application conditions The recommended initial setting is 6 for the 1 2 and 3 in sizes and 8 for the 4 in size see Table 4 Maintenance Relief valve or backpressure regulator parts are subject to normal wear and must be inspected periodically and replaced as necessary Due to the care Emerson takes in meeting all manufacturing requirements heat treating d
8. is available Type LR128 ELASTOMER FABRIC MATERIAL CODE THICKNESS CODE YEAR OF MANUFACTURE RADIAL LOCATION TO LOCATE IMPRINT CODE LOCATE INK CODE BETWEEN RADII DOME IDENTIFICATION MATERIAL INK CODE THICKNESS INK CODE USE ONE LOCATION ONLY MANUFACTURER CODE Figure 17 Diaphragm Markings Table 10 Diaphragm Imprint Codes THICKNESS MATERIAL DIAPHRAGM MATERIAL Imprint Ink Code Imprint Ink Code 2 17E68 17E68 Nitrile NBR Low differential 2 130 4 17E88 17E88 Fluorocarbon FKM High temperature 5 17E97 17E97 Nitrile NBR High erosion resistance Table 11 Diaphragm Material Selection Information 17E68 NITRILE NBR CRITERIA STANDARD 17E97 NITRILE NBR 17E88 FLUOROCARBON FKM Liquid Temperature 20 to 150 F 29 to 66 C 0 to 150 F 18 to 66 C 0 to 250 F 18 to 121 C Best for low pressure differential A General Applications and cold temperature Best for abrasive or Best for high ol erosive service applications temperature applications service applications Heavy Particle Erosion Fair Excellent Good 1 Fluorocarbon FKM is limited to 200 F 93 C in hot water 21 Type LR128 TYPE 11 8 PILOT _ TYPE 112 RESTRICTOR E R
9. travel indicator 1 and 2 in DN 25 and 50 bodies 3 and 4 in DN 80 and 100 bodies Back up Ring PTFE For bodies with travel indicator 2 required 1 and 2 in DN 25 and 50 bodies 3 and 4 in DN 80 and 100 bodies Upper Spring Seat Stainless steel For bodies with travel indicator 1 and 2 in DN 25 and 50 bodies 3 and 4 in DN 80 and 100 bodies O ring For bodies with travel indicator 1 and 2 in DN 25 and 50 bodies Nitrile NBR Fluorocarbon FKM 3 and 4 in DN 80 and 100 bodies Nitrile NBR Fluorocarbon FKM Indicator Fitting Stainless steel For bodies with travel indicator 1 and 2 in DN 25 and 50 bodies 3 and 4 in DN 80 and 100 bodies Travel Indicator Plug Stainless steel For bodies without travel indicator 1 in DN 25 body 2 in DN 50 body 3 and 4 in DN 80 and 100 bodies Indicator Washer For bodies with travel indicator 1 and 2 in DN 25 and 50 bodies 3 and 4 in DN 80 and 100 bodies Indicator Cover Plastic For bodies with travel indicator 1 and 2 in DN 25 and 50 bodies 3 and 4 in DN 80 and 100 bodies Indicator Protector Plastic For bodies with travel indicator 1 and 2 in DN 25 and 50 bodies 3 and 4 in DN 80 and 100 bodies Recommended spare part 26 Part Number 19B2407X012 18B2127X012 18B8513X012 18B5966X012 GE12727X022 18B2126X022 19B0781X022 18B8501X022 ERAAO00905A0 GG01972X012 13A1584X052 13A1584X022 10A3803X062 10A3803X032 114185
10. 10012 12107410012 18659106242 14418806992 1882129012 18859686012 12926740032 12926740022 10191706992 1423906382 2882128701 2885969701 NN 19B2409X01 GE17585X01 28B5970X01 NNN 18B2138X012 18B8503X012 T14188T001 19B2270X01 NN 24B1301X01 29B2269X01 NN Key 23 24 26 28 29 45 47 63 70 129 130 136 Description Inlet Strainer Stainless steel 1 in DN 25 body 2 in DN 50 body 3 in DN 80 body 4 in DN 100 body Nameplate Flow Arrow Drive Screw Stainless steel 1 in DN 25 body 4 required 2 3 and 4 in DN 50 80 and 100 5 required O ring 1 in DN 25 body Nitrile NBR Fluorocarbon FKM 2 in DN 50 body Nitrile NBR Fluorocarbon FKM 3 in DN 80 body Nitrile NBR Fluorocarbon FKM 4 in DN 100 body Nitrile NBR Fluorocarbon FKM Pipe Nipple Steel Stainless steel Bushing Steel Stainless steel Hex Nut For Stainless steel Bonnet SA194 GRADE 8M Stainless steel 1 in DN 25 body 4 required 2 in DN 50 body 8 required 3 in DN 80 body 8 required 4 in DN 100 body 8 required Pipe Plug Steel Stainless steel Standard Piping 3 required Pre piped Pilot Supply 2 required O ring 1 and 2 in DN 25 and bodies Nitrile NBR Fluorocarbon FKM 3 and 4 in DN 80 and 100 bodies Nitrile NBR Fluorocarbon FKM Socket Head Screw Stainless steel For 1 in DN 25 body only Lock Washer Stainless steel For 1 in
11. CONNECTION 1 4 NPT PIPE KO OPTIONAL LOADING CONNECTION 11B5004 A 1 4 NPT NORMALLY PLUGGED Figure 4 Type 112 Restrictor Pilot Adjustment The factory setting of the regulator can be varied within the pressure range stamped on the nameplate To change the set control pressure loosen the jam nut key 17 Figure 14 and turn the adjusting screw key 15 clockwise to increase set control pressure or counterclockwise to decrease it Monitor the set control pressure with a test gauge during the adjustment Tighten the locknut to maintain the desired setting Recommended set control pressure ranges available and color codes of the respective springs are shown in Table 3 Type 112 Restrictor Adjustment Figure 5 The Type 112 restrictor controls the relief valve or backpressure regulator s accuracy and speed of response A restrictor setting of 6 for the 1 2 and 3 in sizes and 8 for the 4 in size are recommended to optimize accuracy speed of response and stability However the restrictor can be used to fine tune the relief valve or backpressure regulator for maximum performance by decreasing the restrictor setting for tighter control increased opening speed decreased closing speed or increasing the restrictor setting for maximum stability decreased opening speed increased closing speed A lower setting also provides a narrower proportional band
12. DN 25 body only Stud For Stainless steel Bonnet B8M Class 2 Stainless steel 1 in DN 25 body 4 required 2 in DN 50 body 8 required 3 in DN 80 body 8 required 4 in DN 100 body 8 required Part Number 20B8004X012 10B4409X012 20B4367X012 20B4374X012 1A368228982 1A368228982 19B2838X012 19B2838X022 18B2124X012 18B2124X022 18B8514X012 18B8514X022 18821406012 18821406022 10330635252 16377235252 14376035252 14352035252 13415847052 13415847022 1043803062 10638037032 1061700012 14329170012 1 284835222 1242935222 16378135222 1 369035222 Type MR98H Pilot Figure 14 Key 10 11 12 13 16 17 Description Parts Kit includes keys 3 4 12 29 59 and 63 With Stainless steel diaphragm and trim With Neoprene CR diaphragm and Nitrile NBR 416 Stainless steel trim Regulator Body 1 2 NPT WCC Steel CF8M Stainless steel Spring Case 1 4 NPT Tapped Vent Use with all other springs WCC Steel CF8M Stainless steel Use with 150 to 375 psig 10 3 to 25 9 bar spring WCC Steel CF8M Stainless steel Orifice 416 Stainless steel Valve Plug 416 Stainless steel Bottom Plug 416 Stainless steel Valve Plug Guide 416 Stainless steel Lower Spring Seat Use with all other springs Aluminum Stainless steel Use with 150 to 375 psig 10 3 to 25 9 bar spring Aluminum Stainless steel Upper Spring Seat Use with all other springs Steel Stainless steel Use with 150 to
13. Instruction Manual November 2014 Type LR128 Relief Valve or Backpressure Liquid Regulator TYPE LR128 REGULATOR Type LR128 TYPE 11 98 PILOT Figure 1 Type LR128 Relief Valve or Backpressure Regulator and Type MR98H Pilot Failure to follow these instructions or to properly install and maintain this equipment could result in bursting of the equipment and or chemical contamination causing property damage and personal injury or death Fisher relief valves and backpressure 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 relief valve or backpressure regulator discharges process fluid or a if leak may be required Failure to correct trouble could result in a hazardous condition Call a qualified service person to service the unit Installation operation and maintenance procedures performed by unqualified personnel may result in improper adjustment and unsafe operation Either condition may result in equipment damage or personal injury Only a qualified person must install or service the relief valve or backpressure regulator The Type LR128 is designed for liquid service Do not operate the regulator in applications where temperatures are below the process fluid s freezing point or above its boiling point w
14. TOR BACKPRESSURE CONTROL Figure 3 Typical Type LR128 Installation Schematic Startup and Shutdown If pressure is introduced first to the main valve before the pilot the main valve may go wide open and subject the downstream system to full inlet pressure Note The maximum inlet pressure for specific constructions are given in Tables 1 and 2 Use a pressure gauge to monitor inlet pressure during startup Relief Installation Figure 3 Startup 1 Close upstream vent valve not shown 2 Slowly open block valve and hand valve if installed 3 Adjust the pilot as needed Shutdown 1 Close block valve and hand valve if installed 2 Slowly open upstream vent valve not shown Backpressure Installation Figure 3 Startup 1 Close upstream and downstream vent valves not shown 2 Slowly open upstream block valve first and then slowly open downstream block valve 3 Adjust the pilot as needed If the pilot is not piped downstream make sure the pilot exhaust is pointed in the correct direction Shutdown 1 Close upstream block valve first and then close the downstream block valve 2 Open downstream and upstream vent valves not shown Type LR128 PILOT SUPPLY CONNECTION 1 4 NPT PIPE CONNECTS TO UPSTREAM PILOT SUPPLY TAP y LOADING CONNECTION 1 4 NPT PIPE CONNECTS TO TYPE LR128 DIAPHRAGM LOADING PORT 4 CONNECTS TO PILOT INLET CONNECTION T OUTLET
15. al 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 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 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 I
16. arts Take the lock nut key 31 off of the pusher post key 10 Slide off the lock washer key 28 lower spring seat key 8 diaphragm key 12 washer key 58 and gasket key 29 8 Slip the valve plug key 4 onto the pusher post key 10 Place a gasket key 29 on the shaft of the pusher post over the threaded portion until it rests on the base of the post The printed side should be facing upwards when installed Place a metal washer key 58 on top of the gasket 9 Slip the lower spring seat key 8 and lock washer key 28 back onto the pusher post key 10 Lubricate the threads of the pusher post and tighten the pusher post lock nut key 31 until the lock washer is flat and then turn the nut an additional 1 8 to 1 4 turn Return the diaphragm key 12 spring seat and pusher post assembly to the body key 1 10 Set the relief valve spring key 11 in the lower spring seat and place the upper spring seat key 9 on the spring 11 Put the spring case key 2 over the spring key 11 and onto the body key 1 Tighten the cap screws key 16 finger tight only 12 To ensure proper slack in the diaphragm key 12 apply some spring compression by turning the adjusting screw key 15 clockwise Finish tightening the cap screws key 16 with 10 to 13 ft lbs 13 56 to 17 63 Nem of torque Type 112 Restrictor Maintenance Avoid personal injury or damage to property from sudden release of pressure or uncontrolled proce
17. cing tight shutoff Backpressure Regulator As long as inlet pressure remains below set pressure the Type MR98H pilot control spring keeps the pilot valve plug closed Force from the main spring in addition to inlet pressure bleeding through the Type 112 restrictor provides downward loading pressure to keep the main valve diaphragm and plug assembly tightly shutoff When inlet pressure rises above the set pressure pressure on the pilot diaphragm overcomes the control spring to stroke the valve plug open The pilot then exhausts loading pressure from the top of the main valve diaphragm Inlet pressure unbalance overcomes the main spring force to open the main valve diaphragm and plug assembly As inlet pressure drops below set pressure the pilot control spring overcomes the diaphragm force to stroke the valve plug down to close Force from the main spring along with pilot loading pressure pushes the diaphragm and plug assembly onto the tapered edge seat producing tight shutoff Installation Personal injury equipment damage or leakage due to escaping process fluid or bursting of pressure containing parts may result if the Type LR128 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 install a Type LR128 relief valve or backpressure regulator
18. ckpressure regulator is a device that maintains a desired upstream pressure by varying the flow in response to changes in upstream pressure It functions the same as a relief valve i e it opens on increasing upstream pressure Relief Valve As long as the inlet pressure is below the set pressure the Type MR98H pilot control spring keeps the pilot valve plug closed Inlet pressure passes through the Type 112 restrictor and registers as loading pressure on top of the Type LR128 diaphragm and plug assembly Force from the main spring in addition to inlet pressure bleeding through the Type 112 restrictor provides a downward loading pressure to keep the main valve diaphragm and plug assembly tightly shutoff When the inlet pressure rises above the set pressure the pressure on the pilot diaphragm overcomes the pilot control spring and opens the pilot valve plug The pilot then exhausts the loading pressure from the top of the main valve diaphragm and plug assembly The inlet pressure unbalance overcomes the main spring force and opens the diaphragm and plug assembly The pilot continuously exhausts process fluid when the inlet pressure is above the set pressure As the inlet pressure drops below the set pressure the pilot control spring closes the pilot valve plug and the exhaust to atmosphere stops Force from the main spring along with pilot loading pressure pushes the diaphragm and plug assembly onto the tapered edge seat produ
19. cold working pressure CWP per ASME B16 34 or product bulletin limit whichever is lowest Temperature may decrease these maximum pressures Table 2 Type MR98H Pilot Maximum Cold Working Pressure BODY AND SPRING BODY SIZE CASE MATERIAL Steel Stainless steel 1 2 NPT MAXIMUM INLET PRESSURE MAXIMUM OUTLET PRESSURE 450 psig 31 0 bar 450 psig 31 0 bar 1 The pressure temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded 2 Temperature and or the body end connection may decrease these maximum pressures Table 3 Relief Set Pressure or Backpressure Control Ranges SET PRESSURE RANGE SPRING WIRE DIAMETER SPRING FREE LENGTH SPRING PART NUMBER PILOT psig bar In mm 25 to 75 1 7 to 5 2 0 234 5 94 Type 70 to 140 4 8 to 9 7 0 283 7 19 MR98H 130 to 200 9 0 to 13 8 0 331 8 41 150 to 375 10 3 to 25 90 0 394 10 0 SPRING MATERIAL AND COLOR 2 595 65 9 Powder coated steel ERAA01910A0 Green 2 44 62 0 Powder coated steel ERAA01911A0 Red 2 250 57 2 Powder coated steel ERAA02889A0 Blue 5 063 129 Powder coated steel 1N943427142 Unpainted 1 150 to 375 psig 10 3 to 25 9 bar spring range is for the Type MR98HH pilot construction Liquid pressure control systems should be designed using engineering practices to eliminate quick control starting or stopping of the flow stream which can pro
20. d replace if necessary Assembly 1 Install the inlet strainer key 23 into the body key 1 Note When installing in a vertical orientation apply lubricant to the bottom of the inlet strainer key 23 to help hold parts in place while installing cage 2 Lightly lubricate and install the cage O ring key 8 Apply lubricant lightly to all O rings or the mating part before installing them 4 Install the cage key 7 and lightly lubricate and install the bonnet O ring key 28 5 Lubricate the top and bottom of the outer edge bead area of the diaphragm key 9 and place diaphragm and plug key 11 assembly on the cage key 7 Lubricate the top plug O ring key 14 ATO If travel indicator was removed lightly lubricate the travel indicator assembly threads key 19 INDICATOR PROTECTOR KEY 22 CAP SCREWS fu li a KEY 3 i COVER KEY 21 INDICATOR WASHER KEY 20 lt r Ni FITTING KEY 19 HEX NUTS KEY 4 BONNET KEY 2 o RING ___7 EE KEY 28 MAIN SPRING 77 KEY 12 sTEM KEY 15 O RING KEY 18 DIAPHRAGM KEY 9 AND PLUG ASSEMBLY KEY 11 7 P NE KEY 7 o RING ___7 KEY 8 KS INLET STRAINER KEY 23 Ao MAIN VALVE BODY E BODY KEY 1 B2615 Figure 6 Type LR128 Main Body Assembly Diagram and screw it into the bonnet key 2 See Travel Indicator Assembly Maintenance for maintenance 8 In
21. duce water hammer The robust design of the Type LR128 allows this relief valve or backpressure regulator to be installed indoors or outdoors Type LR128 is designed to withstand the elements The powder paint coating protects against minor impacts abrasions and corrosion When installed outdoors the Type LR128 does not require protective housing However the Type MR98H pilot should be oriented so that the pilot spring case vent is pointed down Otherwise make sure the vent is protected so that rain moisture insects or any debris will not accumulate inside or block the vent assembly When installed indoors no remote venting is required except on the pilot spring case Refer to Step 8 of the following procedure for the correct venting practices 1 Only personnel qualified through training and experience should install operate and maintain a relief valve or backpressure regulator Before installation make sure that there is no damage to or debris in the main valve body or pilot Also make sure that all tubing and piping are clean and unobstructed Type LR128 Note The Type LR128 internal inlet strainer is intended to prevent occasional large particles from entering the main valve If the flowing media contains continuous particles upstream filtration is recommended before the main valve and in the pilot supply piping reference Figure 3 See the Specifications section for the corresponding mesh size of the internal in
22. eel CF8M or CF3M Stainless steel Bonnet LF2 Steel or 316 316L Stainless steel Bonnet Bushing 416 Hardened Stainless steel Cage 15 5 Stainless steel Type LR128 Main Valve continued Spring 302 Stainless steel or 17 7 Stainless steel Top Plug 17 4 Stainless steel Bottom Plug 416 Stainless steel Inlet Strainer Stainless steel Diaphragm Nitrile NBR or Fluorocarbon FKM O Rings Nitrile NBR or Fluorocarbon FKM Flanged Locknut 17 4 Stainless steel Backup Rings Polytetrafluoroethylene PTFE Upper Spring Seat 416 Stainless steel Indicator Protector and Cover Plastic Indicator Stem 303 Stainless steel Indicator Fitting 416 Stainless steel Travel Indicator Plug 416 Stainless steel Type MR98H Pilot Body WCC Steel or CF8M Stainless steel Spring Case WCC Steel or CF8M Stainless steel Orifice 416 Stainless steel Valve Plug 416 Stainless steel Guide and Pusher Post 416 Stainless steel Gasket Nitrile NBR or Fluorocarbon FKM O rings Nitrile NBR or Fluorocarbon FKM Diaphragm Neoprene CR or Fluorocarbon FKM Mounting Parts Pilot Mounting Pipe Nipple Plated steel or Stainless steel Pipe Fittings Plated steel or Stainless steel Tubing Stainless steel Type 112 Restrictor Body 15 5 Stainless steel Groove Valve 416 Stainless steel Retainer 416 Stainless steel Pipe Plug 316 Stainless steel O rings Nitrile NBR or Fluorocarbon FKM Options Pre piped Pilot Supply Tra
23. egulator to function improperly To prevent plugging and to keep the spring case from collecting moisture corrosive chemicals or other foreign material point the vent down orient it to the lowest possible point on the spring case or otherwise protect it Protect the vent assembly from icing moisture or debris that may cause blockage as required Inspect the vent regularly to make sure it has not been plugged To change the vent orientation twist the vent assembly in the spring case 9 To remotely vent a spring case 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 onto the remote end of the vent pipe NON RESTRICTIVE VENTS AND PIPING ALTERNATE PILOT EXHAUST PIPING 11 a TYPE MR98H PILOT TYPE LR128 MAIN VALVE gt TYPE 112 RESTRICTOR as gt Narn CONTROL LINE STRAINER n 1i lt ALTERNATE CONTROL LINE gt lt STRAINER BLOCK VALVE gt 1 Xt lt 4 HAND VALVE t f V aman PRESSURE LINE RELIEF PRESSURE CONTROL A VENT TO DOWNSTREAM PIPING C TO TYPE LR128 LOADING CHAMBER D PILOT SUPPLY FROM UPSTREAM Type LR128 TYPE LR128 BLOCK VALVE STRAINER MAIN VALVE tet kg BLOCK VALVE ALTERNATE PILOT TYPE MR98H EXHAUST PIPING TYPE 112 RESTRIC
24. eplaced as necessary The frequency of inspection and replacement depends upon the severity of service conditions or the requirements of state and federal laws The following instructions explain the disassembly of the Type MR98H relief or backpressure pilot Lightly apply a good quality lubricant when reassembling Key numbers are referenced in Figure 14 1 Shut down the backpressure regulator or relief valve 2 Relieve the spring tension by loosening the jam nut key 17 and turning the adjusting screw key 15 counterclockwise Remove cap screws key 16 and lift off the spring case key 2 upper spring seat key 9 and relief valve spring key 11 3 Lift out the diaphragm unit which includes the lock nut key 31 lock washer key 28 pusher post key 10 gasket key 29 lower spring seat key 8 diaphragm key 12 valve plug key 4 and an O ring key 45 4 Check the orifice key 3 for wear or damage If it needs to be replaced unscrew the valve plug guide key 7 and then the orifice The valve plug key 4 can be removed by sliding it off of the pusher post key 10 5 Place a small amount of sealant on the threads of the orifice key 3 and valve plug guide key 7 and reinstall these to the body key 1 6 To replace the valve plug O ring key 53 remove the machine screw key 24 and O ring retainer key 25 from the plug Remove and replace the O ring 7 Separate the remainder of the diaphragm unit p
25. g shutdown vent valves are required immediately upstream and downstream of the main valve ona backpressure or bypass installation 7 If system operation during maintenance is required 3 The standard pilot mounting position is as shown install isolating and vent valves as needed in Figure 1 Rotate the bonnet key 2 Figure 7 or 8 The pilot spring case vent key 54 Figure 14 must the pilot Figure 14 for other mounting positions 4 An upstream control line is required and must be installed as shown in Figure 3 into the 1 8 NPT connection in the pilot body assembly Figure 14 Do not make the upstream pipeline connection in or directly downstream of a turbulent area such as a swage or elbow A filter or strainer may be installed in the control line upstream of the pilot to provide clean fluid Inspect and clean this filter regularly to make sure it is not plugged which can prevent proper pilot operation Run a supply pressure line from the upstream pipeline to the restrictor inlet use 3 8 NPT outer diameter tubing or larger Install a filter or strainer upstream of the restrictor if needed to keep the supply source from clogging the restrictor or pilot Inspect and clean this filter regularly to make sure it has not been plugged which can prevent proper relief valve or backpressure operation be kept open to atmospheric pressure A clogged pilot spring case vent may cause the relief valve or backpressure r
26. h 100 to 375 psig 6 9 to 26 0 bar spring Washer 416 Stainless steel 316 Stainless steel Valve Plug O ring Nitrile NBR Fluorocarbon FKM Bottom Plug Seal Nitrile NBR Fluorocarbon FKM Type 112 Restrictor Figure 16 Key Description Pipe Plug 316 Stainless steel Restrictor Body CB7Cu 2 Stainless steel Groove Valve 416 Stainless steel Valve Retainer 416 Stainless steel Groove Valve O ring 2 required Nitrile NBR Fluorocarbon FKM Part Number ERAA01884A0 10225628982 1J4159X0012 11341535232 ERAA01919A0 ERAA01919A1 ERAA02651A0 ERCA00663A0 ERAA02123A0 ERCA02968A0 ERCA02968A1 17B6530X012 GF05050X012 GF05050X022 1D2888X0032 1D2888X0052 ERCA03016A0 ERCA03016A1 Part Number 1A767535072 20B4429X012 20B4403X012 10B4402X012 10853806992 1C8538X0052 Pre piped Pilot Supply Figure 19 Key 59 60 61 62 Description Nipple Steel Stainless steel Pipe Elbow Steel Stainless steel Tube Connector 2 required Steel Stainless steel Tubing 316 Stainless steel Part Number 27 Type LR128 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 Natur
27. h temperature 3 in DN 80 body 17E68 Nitrile NBR low differential 17E97 Nitrile NBR high erosion 17E88 Fluorocarbon FKM high temperature 4 in DN 100 body 17E68 Nitrile NBR low differential 17E97 Nitrile NBR high erosion 17E88 Fluorocarbon FKM high temperature 10 O ring 1 and 2 in DN 25 and 50 bodies Nitrile NBR Fluorocarbon FKM 3 and 4 in DN 80 and 100 bodies Nitrile NBR Fluorocarbon FKM Part Number 18B3438X012 1N430306382 10A8931X012 10A8931X052 39B2413X012 37B9748X012 48B5961X012 48B2135X012 14A5713X012 13A2351X012 10B4428X012 10B4428X022 10B4366X012 10B4366X022 10B4373X012 10B4373X022 30010096012 GE11960X012 39B2397X022 29B1909X012 28B2123X052 29B2715X012 38B9886X012 39B2726X012 38B8512X022 38B8509X012 39B3996X012 39B1154X012 1E216306992 1L949306382 1J4888X0052 1J4888X0032 Table 12 Type LR128 Main Valve Body Part Numbers Key 1 Figure 7 Type LR128 BODY SIZE ON BODY MATERIAL END CONNECTION STYLE PART NUMBER NPT GE11581X012 SWE GE11440X012 CL150 RF GE11583X012 WCC Steel CL300 RF GE11607X012 CL600 RF GE11608X012 PN 16 25 40 RF GE13625X012 a NPT GE11581X022 CL150 RF GE11583X022 CF8M Stainless steel CL300 RF GE11607X022 CL600 RF GE11608X022 PN 16 25 40 RF GE13625X022 CF3M Stainless steel CL150 RF GE11583X032 NPT
28. he indicator fitting key 19 into the bonnet key 2 Figure 7 tighten to the proper torque see Table 9 To set the travel indicator hold the indicator cover key 21 next to the indicator fitting key 19 Screw the hex nuts key 4 and the indicator washer key 20 down on the indicator stem key 15 until the washer is even with the lowest marking on the indicator cover Lightly lubricate the indicator cover threads and install Replace the indicator protector key 22 To replace the travel indicator with the non travel indicator option place the main spring key 12 into the bonnet Install the indicator plug key 19 Figure 11 and tighten to proper torque see Table 9 Type LR128 Type MR98H Pilot Maintenance To avoid personal injury property damage or equipment damage caused by sudden release of pressure or uncontrolled process fluid do not attempt any maintenance or disassembly without first isolating the regulator from system pressure and relieving all internal pressure from the regulator Relief valves or regulators that have been disassembled for repair must be tested for proper operation before being returned to service Only parts manufactured by Emerson should be used for repairing Fisher relief valves and regulators Due to normal wear and damage that may occur from external sources relief valve parts such as the O rings gaskets diaphragm orifice and valve plug should be inspected periodically and r
29. hich are 3 i F dependent on the process fluid and the develops in the system service to the unit application pressures www fisherregulators com amp 4 EMERSON Process Management D103578X012 Type LR128 Specifications Specifications for the Type LR128 relief valve or backpressure regulator are shown below Other information for the main valve appears on the nameplate The control spring range for the pilot is marked on the nameplate of Type MR98H pilot Main Valve Body Sizes End Connection Styles and Structural Design Ratings See Table 1 Maximum Inlet Pressures Type LR128 Main Valve See Table 1 Type MR98H Pilot See Table 2 Type 112 Restrictor 1500 psig 103 bar Maximum Outlet Pressure Type LR128 Main Valve See Table 1 Type MR98H Pilot 450 psig 31 0 bar Relief Set Pressure Backpressure Control Ranges See Table 3 Main Valve Plug Travel 1 in DN 25 0 37 in 9 4 mm 2 in DN 50 0 68 in 17 mm 3 in DN 80 0 98 in 25 mm 4in DN 100 1 19 in 30 mm Main Valve Minimum Differential Pressures See Table 6 Main Valve Maximum Differential Pressures See Table 7 Main Valve Internal Inlet Strainer Sizes 1 in DN 25 12 Mesh 0 0661 in 1 68 mm 2 3 and 4 in DN 50 80 and 100 10 Mesh 0 0787 in 2 00 mm Temperature Capabilities See Table 11 Pressure Registration External 1 8 NPT Spring Case Vent Type Y602 12 Construction Materials Type LR128 Main Valve Body WCC St
30. imensional tolerances etc use only replacement parts manufactured or furnished by Emerson Also when lubrication is required use a good quality lubricant and lightly coat the recommended part W4559_1 Type LR128 RESTRICTOR ADJUSTMENT Increased performance E Decreased performance 1 See Table 4 for recommended restriction settings TYPE 112 RESTRICTOR ADJUSTMENT GUIDE RESTRICTOR SETTING GUIDE Figure 5 Restrictor Adjustment and Restrictor Setting Guide Table 4 Recommended Setting for Type 112 Restrictor BODY SIZE RECOMMENDED RESTRICTION SETTING 1and 2 25 and 50 6 other restriction settings may be used 3 80 6 or 8 lower settings are not recommended 4 100 8 lower settings are not recommended The frequency of inspection and parts replacement depends upon the severity of service conditions applicable codes and government regulations and company inspection procedures Table 8 lists possible relief valve or backpressure regulator issues and solutions for them Type LR128 Main Valve Trim Parts Maintenance Instructions are given for complete disassembly and assembly The main valve may remain in the pipeline during maintenance procedures Key numbers are referenced in Figures 7 through 11 Avoid personal injury or damage to property from sudden release of pressure or uncontrolled process fluid Before starting to disassemble carefull
31. l pressure above 400 psid 27 6 bar d diaphragm temperatures are limited to 150 F 66 C 3 These are recommendations that provide the best regulator performance for a typical application Please contact your local Sales Office for further information if a deviation from the standard recommendations are required Table 8 Troubleshooting Guide ISSUE POSSIBLE SOLUTION SEE FIGURES 7 AND 14 FOR PARTS LOCATION Check for damage or improper installation of the main valve O rings Unit does not provide tight shutoff when erosion or trapped debris on the cage and diaphragm surfaces inlet pressure is below set pressure damage or debris on the surfaces of the pilot plug and seat mineral deposits or sediment buildup inside the spaces of the restrictor and or pilot supply strainer filter debris clogging the gaps inside the restrictor Check for Main valve is wide open when inlet debris in the restrictor pilot or pilot supply strainer filter pressure is below set pressure e debris in the main valve main valve and pilot diaphragms for damage Liquid escapes from pilot spring case Replace pilot diaphragm assembly Liquid escapes from travel indicator Replace indicator stem O ring if indicator is not desired convert to a non travel indicator assembly Check for Unit does not open when inlet pressure clogged main valve inlet strainer if used or pilot supply strainer filter if used is above set pressure main valve
32. ldup over the set pressure at which the main valve starts audible flow 3 Inlet pressure buildup over the set pressure for the main valve to achieve wide open flow capacity Table 6 Type LR128 Main Valve Minimum Differential Pressures MINIMUM DIFFERENTIAL PERCENT OF CAPACITY Many DE DIAPHRAGM For 90 Capacity For 100 Capacity In DN Diaphragm Code Diaphragm Material psid bard psid bard 17E68 standard Nitrile NBR Low Minimum Differential 30 2 1 30 2 1 1 25 17 97 Nitrile NBR High Erosion Resistance 35 2 5 35 2 5 Fluorocarbon FKM 17E98 High Temperature Capability 21 eo 2 1 17E68 standard Nitrile NBR Low Minimum Differential 18 1 2 19 1 3 2 50 17E97 Nitrile NBR High Erosion Resistance 24 1 7 24 1 7 Fluorocarbon FKM WES High Temperature Capability 19 12 13 2 17E68 standard Nitrile NBR Low Minimum Differential 21 1 5 28 1 9 3 80 17E97 Nitrile NBR High Erosion Resistance 23 1 6 23 1 6 Fluorocarbon FKM HERS High Temperature Capability 2 19 29 1 9 17E68 standard Nitrile NBR Low Minimum Differential 16 1 1 30 2 1 4 100 17E97 Nitrile NBR High Erosion Resistance 16 1 1 34 2 3 Fluorocarbon FKM 17589 High Temperature Capability 49 4 21 1 See Table 1 for Type LR128 main valve structural design ratings and Table 2 for Type MR98H pilot rating 10 Type LR128 Table 7 Type LR128 Maximum Pressure Ra
33. let strainer 2 A Type LR128 relief valve or backpressure regulator may be installed in any orientation as long as flow through the unit matches the direction of the arrow on the main valve body and the pilot vent is pointed down However for easier maintenance install the regulator with the bonnet up Provide adequate support to the bonnet when disassembling Type LR128 relief valve or backpressure regulator installed in a vertical installation or other application where the bonnet is not oriented upward Without adequate support the bonnet may fall and cause physical injury when the cap screws are loosened 6 Apply a good grade of pipe compound to the external pipeline threads for a threaded body or use suitable line gaskets for a flanged body Use approved piping procedures when installing the relief valve or backpressure regulator When used in relief valve service the Type LR128 may leak toxic chemical to the environment In toxic or hazardous liquid service leaked chemical may accumulate and cause personal injury death or property damage due to escaping fluid To prevent such injury or damage provide piping or tubing to vent the hazardous liquid to a remote safe location away from air intakes or any hazard prone location The exhaust piping must be designed and installed to guard against excessive flow restriction Protect the vent line or stack opening against condensation or clogging For safety durin
34. nc 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 2 EMERSON Emerson Process Management Regulator Technologies Inc 2012 2014 All Rights Reserved
35. nd Plug Assembly Maintenance The diaphragm and plug assembly can be replaced as a single unit a diaphragm cartridge or individual components within the assembly can be replaced When replacing individual components inspect each component for damage and wear and replace parts as needed See Figure 17 and Table 10 for the Diaphragm Markings and Diaphragm Imprint Codes Key numbers for the following assembly and disassembly procedure are referenced in Figures 9 and 12 1 Place a screwdriver or similar tool through the hole in the top plug key 5 2 Remove the flanged nut key 13 from the bottom plug key 11 This loosens the entire assembly Note On 1 in DN 25 body remove the socket head screw key 129 and lock washer key 130 from the bottom plug 3 Remove the bottom plug key 11 and the bottom plug O ring key 10 4 Remove the diaphragm key 9 5 Remove the top plug O rings keys 14 and 70 6 Check all components for damage or wear and replace as necessary 7 When reassembling be sure to lubricate all O rings before installing and add a thread locking compound to the threads of the top plug 8 Reassemble in the reverse order Hold the top plug key 5 Place the parts on the top plug in the following order O ring key 14 O ring key 70 Diaphragm key 9 O ring key 10 Bottom Plug key 11 Flanged Nut key 13 On 1 in DN 25 body lock washer key 130 then socket head screw key 129
36. r if there is a need to inspect and remove accumulated dirt mineral deposit clogged debris or sediment buildup inside the restrictor Key numbers are referenced in Figure 16 1 Unscrew the groove valve key 22 and retainer key 23 just enough to loosen them but do not completely separate 2 As shown in Figure 15 push on the retainer key 23 to push the groove valve key 22 out of the body key 21 then complete disassembly 3 Inspect the gaps and small spaces inside the restrictor Check and remove any debris accumulated dirt mineral deposit or sediment buildup that clogs the restrictor 4 Replace the groove valve O rings key 24 if necessary being sure to lightly apply lubricant to the replacement O rings before installing them in the groove valve and retainer 20 5 Install the groove valve key 22 into the same side of the body where the scale appears Install the retainer into the opposite side of the body and tighten until both are secure 6 When all maintenance is complete refer to the Startup and Adjustment section to put the regulator back into operation Parts Ordering When corresponding with your local Sales Office about this equipment reference the equipment serial number or FS number found on a nameplate attached to the bonnet 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
37. ss fluid Before starting to disassemble carefully release all pressures according to the shutdown procedure Use gauges to monitor inlet loading and outlet pressures while releasing these pressures Note Accumulated dirt mineral deposit clogged debris or sediment buildup inside the restrictor may cause the unit response to get slower and unit performance to decrease If any of these is suspected immediately inspect and clean the restrictor Type LR128 L22146 o Y Same LTT IE LN RY BRS NS NR N SSN XY N h AY 2 J AN AB S 04916 APPLY LUBRICANT SEALANT L1 GENERAL PURPOSE PTFE OR LITHIUM GREASE FOR O RINGS L2 ANTI SEIZE COMPOUND aN GY 6 1 Lubricants and sealants must be selected such that they meet the temperature requirements 2 Apply L2 anti seize compound on key 16 for stainless steel bolts Figure 14 Type MR98H Pilot Assembly Type LR128 2084393 5 APPLY LUBRICANT SEALANT S THREAD SEALANT L ANTI SEIZE LUBRICANT 1 Lubricant and sealant must be selected such that they meet the temperature requirements Figure 16 Type 112 Restrictor Perform the following procedure if O rings are leaking o
38. stall the bonnet key 2 in proper orientation 9 Lubricate cap screws key 3 and secure the bonnet key 2 using an even crisscross pattern It may be necessary to push down on bonnet to start cap screws Tighten cap screws to proper torque see Table 9 Type LR128 32960 ONEINONONO Ay WIA Sey i i SE ie Li E 4 j K i ee s Kf NAW SL NNN NR x BEEK A S DAY E py FN S Z 080 L1 L1 L1 14 L1 L2 70 L1 SE MAIN VALVE ASSEMBLY FOR 1 IN DN 25 BODY SIZE Figure 7 Type LR128 Main Valve Type LR128 48B2142_C 21 20 19 17 A ES iim T IML 10 11 APPLY LUBRICANT SEALANT L1 LITHIUM POLYMER TYPE LUBRICANT MULTI PURPOSE GREASE L2 ANTI SEIZE LUBRICANT S MEDIUM STRENGTH THREADLOCKER 1 Lubricants and sealant must be selected such that they meet the temperature requirements 14 MAIN VALVE ASSEMBLY FOR 2 3 AND 4 IN DN 50 80 AND 100 BODY SIZES Figure 7 Type LR128 Main Valve continued 15 L1 18 9 3 L2 13 23 48B2142_C B2617_D
39. th travel indicator 2 required 1 and 2 in DN 25 and 50 bodies Zinc plated Carbon steel 3 and 4 in DN 80 and 100 bodies Stainless steel Top Plug Stainless steel 1 in DN 25 body 2 in DN 50 body 3 in DN 80 body 4 in DN 100 body Recommended spare part 24 RLR1258N182 RLR1258N172 RLR1258F 182 RLR1258N282 RLR1258N272 RLR1258F282 RLR1258N382 RLR1258N372 RLR1258F382 RLR1258N482 RLR1258N472 RLR1258F482 See Table 12 39B2403X022 ERAA00892A1 38B2122X022 ERAA00893A1 38B5963X022 ERAA00894A1 38B2133X022 ERAA00895A1 1R281124052 1A453324052 1A454124052 1A440224052 1H322228982 11286338992 2982404012 28821304012 28885117012 2885964012 Key Description 6 O ring 1 and 2 in DN 25 and 50 bodies Nitrile NBR Fluorocarbon FKM 3 and 4 in DN 80 and 100 bodies Nitrile NBR Fluorocarbon FKM 7 Cage 1 in DN 25 body 2 in DN 50 body 3 in DN 80 body 4 in DN 100 body 8 Cage O ring 1 in DN 25 body Nitrile NBR Fluorocarbon FKM 2 in DN 50 body Nitrile NBR Fluorocarbon FKM 3 in DN 80 body Nitrile NBR Fluorocarbon FKM 4 in DN 100 body Nitrile NBR Fluorocarbon FKM 9 Diaphragm 1 in DN 25 body 17E68 Nitrile NBR low differential 17E97 Nitrile NBR high erosion 17E88 Fluorocarbon FKM high temperature 2 in DN 50 body 17E68 Nitrile NBR low differential 17E97 Nitrile NBR high erosion 17E88 Fluorocarbon FKM hig
40. tings and Diaphragm Selection Information MAXIMUM MAXIMUM MAXIMUM BODY SIZE OPERATING OPERATING EMERGENCY INLET DIAPHRAGM INLET DIFFERENTIAL AND DIFFERENTIAL DIAPHRAGM MATERIAL PRESSURE PRESSURE PRESSURE STYLE psid bard psid bard 17E68 Nitrile NBR Low temperature 400 27 6 17E97 Nitrile NBR High pressure 450 31 0 4502 31 02 450 31 0 1 25 and or erosion resistance 17E88 Fluorocarbon FKM High aromatic 450 310 4502 31 02 450 31 0 hydrocarbon content resistance 17E68 Nitrile NBR Low temperature 450 31 0 400 27 6 450 31 0 17E97 Nitrile NBR High pressure 450 310 4502 31 02 450 31 0 2 50 and or erosion resistance 17E88 Fluorocarbon FKM High aromatic 450 31 0 4502 31 0 450 31 0 hydrocarbon content resistance i30 17E68 Nitrile NBR Low temperature 360 24 8 300 20 7 450 31 0 17E97 Nitrile NBR High pressure 450 31 0 4502 31 02 450 31 0 3 80 and or erosion resistance 17E88 Fluorocarbon FKM High aromatic 450 31 0 4502 31 02 450 31 0 hydrocarbon content resistance 17E68 Nitrile NBR Low temperature 360 24 8 300 20 7 450 31 0 17E97 Nitrile NBR High pressure 450 31 0 4502 31 02 450 31 0 4 100 and or erosion resistance 17E88 Fluorocarbon FKM High aromatic 450 31 0 4502 31 02 450 31 0 hydrocarbon content resistance 1 See Table 1 for main valve structural design ratings and Table 3 for pilot ratings 2 For differentia
41. vel Indicator 1 The pressure temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded 2 Nominal sieve opening Introduction Scope of the Manual This Instruction Manual provides installation startup adjustment maintenance and parts ordering information for Type LR128 relief valve or backpressure regulator 1 2 NPT Type MR98H pilot and Type 112 restrictor Product Description The Type LR128 pilot operated relief valve or backpressure regulator is used for liquid applications and include a Type 112 restrictor and a 1 2 NPT Type MRQ8H pilot Type LR128 TYPE 112 RESTRICTOR TYPE MR98H PILOT OPTIONAL TRAVEL INDICATOR MAIN SPRING DIAPHRAGM AND PLUG ASSEMBLY INTERNAL STRAINER L INLET PRESSURE E OUTLET PRESSURE 777 ATMOSPHERIC PRESSURE LOADING PRESSURE TYPE LR128 WITH TYPE MR98H PILOT AND TYPE 112 RESTRICTOR Figure 2 Type LR128 Operational Schematic Type LR128 Pilot Type Description Type MR98H High pressure relief pilot for 25 to 375 psig 1 7 to 25 9 bar set pressures Designed to handle inlet pressures up to 450 psig 31 0 bar Principle of Operation Figure 2 A pressure relief valve is a throttling pressure control device that limits pressure build up it opens to prevent the rise of internal pressure in excess of a specified value Fisher relief valves cannot be used as ASME safety relief valves A ba
42. where e Service conditions are within unit capabilities including those in the Specifications section e Service conditions are within applicable codes regulations or standards Additionally physical damage to the relief valve or backpressure regulator could break the pilot off the main valve causing personal injury and property damage due to escaping process fluid To avoid such injury and damage install the regulator in a safe location Type LR128 Table 1 Type LR128 Main Valve Body Sizes End Connection Styles Structural Design Ratings and Maximum Operating Inlet Pressures MAXIMUM OPERATING MAIN VALVE MAIN VALVE STRUCTURAL DESIGN RELIEF INLET MAXIMUM OPERATING BODY SIZE BODY END CONNECTION STYLE RATING PRESSURE INCLUDING OUTLET PRESSURE MATERIAL BUILD UP In DN psig bar psig bar psig bar NPT or SWE 1 and 2 in only L150 RF WCC Steel L300 RF L600 RF PN 16 25 40 RF 4 100 NPT 1 and 2 in only 1440 99 2 450 31 0 450 31 0 CL150 RF 275 19 0 275 19 0 275 19 0 Fam CL300 RF 720 49 6 Stainless steel CL600 RF 1440 99 2 450 31 0 450 31 0 PN 16 25 40 RF 580 40 0 1 The pressure temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded 2 Ratings and end connections for other than ASME standard can usually be provided Contact your local Sales Office for assistance 3 Maximum
43. x nut key 4 on the top of the indicator stem key 15 4 Use a wrench to remove indicator fitting key 19 Lift out travel indicator assembly If replacing travel indicator with travel indicator plug skip to step 9 6 Compress the main spring key 12 Remove the second hex nut key 4 Parts will separate easily when the hex nut is removed N Slide the indicator stem key 15 out of the indicator fitting key 19 The main spring key 12 and upper spring seat key 17 will disengage 8 If necessary use the indicator stem key 15 to pry the back up rings key 16 and O ring key 18 out of the indicator fitting key 19 9 Check the indicator fitting O ring key 6 Lubricate and replace if necessary 10 To replace travel indicator parts lubricate all O rings back up rings and threads To reassemble hold the indicator stem key 15 and place the parts on the stem in the following order see Figure 13 Main Spring key 12 small end first Upper Spring Seat key 17 make sure to place the large end toward the spring First Back up Ring key 16 O ring key 18 Second Back up Ring key 16 Indicator Fitting key 19 the back up rings key 16 and O ring key 18 should slide into the indicator fitting and the small end of the upper spring seat key 17 should slide into the indicator fitting First Hex Nut key 4 Indicator Washer key 20 Second Hex Nut key 4 11 Install t
44. y release all pressures according to the Shutdown procedure Use gauges to monitor inlet loading and outlet pressures while releasing these pressures Type LR128 Table 5 Build up Pressure Needed to Begin Opening and Fully Open Main Valve and Pressure Drop Needed to Reseat Pilot BUILDUP OVER SET BUILDUP OVER SET PRESSURE DROP BELOW SPRING RANGE SET PRESSURED PRESSURE NEEDED TO PRESSURE NEEDED TO SET PRESSURE NEEDED SPRING PART NUMBER BEGIN OPENING OF FULLY OPEN SO RESEATPLLOT AND SPRING COLOR MAIN VALVE MAIN VALVE psig bar psig bar psig bar psig bar 25 to 75 psig 1 7 to 5 2 bar 35 24 1 0 07 1 0 07 2 0 14 ERAA01910A0 50 3 4 1 0 07 1 0 07 2 0 14 Green 75 5 2 1 0 07 6 0 41 2 0 14 70 4 8 1 0 07 4 0 28 5 0 34 70 to 140 psig 4 8 to 9 7 bar 100 6 9 1 0 07 10 0 69 5 0 34 ERAA01911A0 Red 125 8 6 1 0 07 13 0 90 5 0 34 140 9 7 1 0 07 16 1 1 5 0 34 130 9 0 1 0 07 14 0 97 6 0 41 130 to 200 psig 9 0 to 13 8 bar 150 10 3 1 0 07 14 0 97 6 0 41 ERAA02889A0 Blue 175 12 1 1 0 07 17 1 2 6 0 41 200 13 8 1 0 07 17 1 2 6 0 41 150 10 3 1 0 07 9 0 62 7 0 48 200 13 8 1 0 07 10 0 69 7 0 48 150 to 375 psig 10 3 to 25 9 bar 250 17 2 1 0 07 11 0 76 7 0 48 1N943427142 Unpainted 300 20 7 1 0 07 15 1 03 7 0 48 350 24 1 1 0 07 15 1 03 7 0 48 375 25 9 1 0 07 25 1 7 7 0 48 1 Set pressure is defined as the pressure at which the pilot starts to discharge 2 Inlet pressure bui
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