Emerson MR108 Instruction Manual
Contents
1. APPLY LUBRICANT OR SEALANT L1 MULTI PURPOSE PTFE LUBRICANT L2 MULTI PURPOSE NLGI GRADE 1 GREASE L3 ANTI SEIZE COMPOUND S MULTI PURPOSE PTFE THREAD SEALANT 1 Lubricants and sealants must be selected such that they meet the temperature requirements 2 National Lubricating Grease Institute Figure 4 Type MR108 Direct Operated Backpressure Regulator Assemblies continued 21 Type MR108 HIGH PRESSURE ACTUATOR OPTION GE38436 NOTE KEYS 64 AND 71 ARE USED ONLY FOR PRESSURE LOADED ACTUATORS APPLY LUBRICANT OR SEALANT L1 MULTI PURPOSE PTFE LUBRICANT S MULTI PURPOSE PTFE THREAD SEALANT 1 Lubricants and sealants must be selected such that they meet the temperature requirements Figure 4 Type MR108 Direct Operated Backpressure Regulator Assemblies continued 22 Type MR108 DETAIL W GE38436 DETAIL Y DETAIL Z APPLY LUBRICANT L1 MULTI PURPOSE PTFE LUBRICANT i must be selected such that they meet the temperature requirements Figure 4 Type MR108 Direct Operated Backpressure Regulator Assemblies continued Type MR108 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 202. completely down DRAIN VALVE KEY 82 Type MR108 1 8 NPT INLET BLEED VALVE KEY 85 Figure 3 Type MR108 with High Pressure Actuator Drain Valve and Bleed Valve Option The factory setting of the backpressure regulator is the midpoint of the spring range unless otherwise specified on order The allowable spring range is stamped on the nameplate If a pressure setting beyond the indicated range is required substitute the appropriate spring Be sure to relabel the valve to indicate the new pressure range Always use a pressure gauge to monitor pressure when making adjustments All regulator springs can be backed off to 0 psig 0 bar Recommended backpressure control ranges available maximum inlet pressures and temperatures and color codes of the respective springs are shown in the Specifications section and Table 2 Loosen the jam nut key 72 To increase the setting turn the adjusting screw key 73 clockwise Turn the adjusting screw counterclockwise to decrease the setting Tighten the jam nut to maintain the desired setting Shutdown Escaping process fluid from an open drain valve may result in regulator damage personal injury and property damage To avoid such injury and damage make certain the drain valve if used is properly closed after bleeding process fluid 1 Isolate the regulator from the system in steps 2 and 3 2 Close the upstream shutoff valve to the regulator inlet 3 Clos
3. casings keys 62 and 63 Lubricate the cap screws key 57 and nuts key 58 and carefully insert through holes in the outer flange of the diaphragm casings keys 62 and 63 and diaphragm key 56 Tighten the cap screws to the hex nuts to a final torque value of 45 to 55 ft lbs 61 to 75 Nem Place the control spring key 68 inside the hole in the upper diaphragm casing key 63 and over the lower spring seat key 54 The spring should be sitting on top of the lower spring seat Lubricate the bore on the top of the upper spring seat key 69 where the adjusting screw key 73 will make contact Place the upper spring seat on top of the control spring key 68 Type MR108 22 Install the spring case key 70 over the control spring key 68 and upper spring seat key 69 and on top of the upper diaphragm casing key 63 Align the holes in the spring case with the holes in the upper casing while ensuring the vent assembly key 26 is aligned with valve body inlet 23 Lubricate cap screws key 67 and use to secure the spring case key 70 to the spring case spacer key 66 Tighten the cap screws to a final torque of 25 to 28 ftlbs 34 to 38 Nem Personal injury equipment damage or leakage due to escaping fluid may result if adjusting screw key 73 and jam nut key 72 are not installed properly Also spring key 68 may go solid resulting in the backpressure regulator not opening if jam nut is not installed and adjusti
4. in horizontal installations with the actuator on the side however this could result in premature wear of parts Make sure that flow will be in the same direction as that indicated by the body arrow Orientation of the two vents should always be down Vents may be rotated after regulator installation so that the vent screens are down Before installing the regulator e Check for damage which might have occurred during shipment e Check for and remove any dirt or foreign material which may have accumulated in the regulator body e Blow out any debris dirt or copper sulfate in the tubing and the pipeline e Apply pipe compound to the external threads of the pipe before installing the regulator e Make sure gas flow through the regulator is in the same direction as the arrow on the body Inlet and Outlet connections are clearly marked Note For proper regulator control and operation make certain the flow arrow matches the flow direction Installation Location This regulator can be installed in a pit which is prone to flooding The vents of the spring case and lower diaphragm casing High Pressure Actuator or bonnet Low Pressure Actuator should be above the expected flood level or vent lines should be installed to terminate above the water level so that they are exposed to atmospheric pressure e The installed regulator should be adequately protected from vehicular traffic and damage fr
5. rise to personal injury and property damage Note In this parts list parts marked NACE are intended for corrosion resistant service as detailed in the NACE International Standard MR0175 2003 and MR0103 Key Description Part Number Elastomer Trim Parts kit included are keys 4 12 14 15 17 20 and 21 Nitrile NBR NPS 1 DN 25 Body Size RMR1058XN12 NPS 2 DN 50 Body Size RMR1058XN22 NPS 3 DN 80 Body Size RMR1058XN32 NPS 4 DN 100 Body Size RMR1058XN42 Elastomer Trim Parts kit included are keys 4 12 14 15 17 20 and 21 Fluorocarbon FKM NPS 1 DN 25 Body Size RMR1058XF 12 NPS 2 DN 50 Body Size RMR1058XF22 NPS 3 DN 80 Body Size RMR1058XF32 NPS 4 DN 100 Body Size RMR1058XF42 Ethylene Propylene EPDM NPS 1 DN 25 Body Size RMR1058XE12 NPS 2 DN 50 Body Size RMR1058XE22 NPS 3 DN 80 Body Size RMR1058XE32 NPS 4 DN 100 Body Size RMR1058XE42 Actuator Parts kit keys 45 and 46 requires 2 key 47 requires 2 key 48 requires 2 keys 49 51 56 and 60 Low Pressure Actuator only Nitrile NBR Low Pressure Actuator RMR1058XNL2 High Pressure Actuator RMR1058XNH2 Fluorocarbon FKM Low Pressure Actuator RMR1058XFL2 High Pressure Actuator RMR1058XFH2 Ethylene Propylene EPDM Low Pressure Actuator RMR1058XEL2 High Pressure Actuator RMR1058XEH2 1 Valve Body 2 Body Flange See following table For NPS 1 DN 25 Body Size WCC Steel GE39061X012 CF8M Stainless steel NACE GE39061X022 CF3M Stainless steel NACE GE3906
6. side of the lower diaphragm head key 53 should be facing up toward the threaded end of the actuator stem key 40 Carefully install the lower diaphragm head over the actuator stem 15 16 17 18 19 20 21 Type MR108 Note Exercise care to ensure that the actuator stem key 40 enters and exits the lower diaphragm head bore without pinching cutting or damaging in any way the lower diaphragm head O ring key 51 Lubricate the convoluted side of the diaphragm key 56 and place over the actuator stem key 40 and on top of the lower diaphragm head key 53 The convolutions of the diaphragm should be pointing up Place the lower spring seat key 54 and Belleville spring washer key 49 over the actuator stem key 40 and on top of the diaphragm key 56 The raised inner diameter of the spring washer should be pointing toward the threaded end of the actuator stem Lubricate the threads of the actuator stem key 40 and thread the two jam nuts key 48 onto it Using wreckflats hold the stem and torque the jam nuts individually Tighten to a torque of 12 to 14 ft lbs 16 to 19 Nem Install the upper diaphragm casing key 63 while aligning the bolt circle holes in the upper diaphragm casing diaphragm key 56 and lower diaphragm casing key 62 Note Exercise care to ensure that the diaphragm key 56 is not pinched twisted or wrinkled while compressing between the upper and lower diaphragm
7. 0X012 Silver 0 50 12 7 175 to 300 12 1 to 20 7 GE43002x012 Red 0 63 16 0 1 Maximum setpoint is limited to 150 psig 10 3 bar for constructions with Fluorocarbon FKM diaphragm 2 Not applicable for constructions with Fluorocarbon FKM diaphragm Table 3 Wide Open Flow and IEC Sizing Coefficients WIDE OPEN COEFFICIENTS IEC SIZING COEFFICIENTS BODY SIZE Line Size Equals Body Size Cc Km FL Xr Fa NPS DN C C Quick Opening Cage 1 25 597 17 5 34 1 0 81 0 90 0 73 0 43 2 50 1740 48 2 36 1 0 81 0 90 0 82 0 34 3 80 3540 103 1 34 4 0 76 0 87 0 75 0 32 4 100 4300 135 9 31 6 0 72 0 85 0 65 0 3 Reduced Port Quick Opening Cage 2 50 1570 43 8 35 9 0 81 0 90 0 72 0 36 Introduction oil installations or any application where speed of Scope of the Manual This instruction manual provides installation adjustment maintenance and parts ordering information for Type MR108 backpressure regulators Description The Type MR108 regulators are direct operated backpressure high capacity multi purpose regulators They are designed to handle pressures of up to 400 psig 27 6 bar and temperatures of up to 250 F 121 C Large multi purpose regulators provide fast simple reliable and economical pressure control for a number of applications and are suitable for different flow media such as liquid air and gas In addition the drain valve option allows you to drain the system without expensive spool pieces saving you time and space Also the bl
8. 1206 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 For further information visit www fisherregulators com 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 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 res
9. 1X032 For NPS 2 DN 50 Body Size WCC Steel GE39060X012 CF8M Stainless steel NACE GE39060X022 CF3M Stainless steel NACE GE39060X032 For NPS 3 DN 80 Body Size WCC Steel GE39059X012 CF8M Stainless steel NACE GE39059X022 CF3M Stainless steel NACE GE39059X032 Key 1 Type MR108 Valve Bodies Type MR108 BODY SIZE NPS DN MATERIAL END CONNECTION 1 25 2 50 3 80 4 100 NPT 34B7611X012 38A8845X012 eee eee ee eee Cast Iron CL125 FF 34B8630X012 38A8847X012 38A8851X012 38A8865X012 CL250 RF 37B5950X012 38A8846X012 38A8850X012 38A8854X012 NPT 37B5946X012 38A8848X012 ee eee eee eee CL150 RF 37B5947X012 38A8853X012 38A8872X012 38A8867X012 WCC Steel CL300 RF 37B5948X012 38A8849X012 38A887 1X012 38A8869X012 CL600 RF 37B5949X012 38A8844X012 38A8852X012 38A8866X012 DIN PN 16 25 40 RF GE05956X012 GE05960X012 GE05965xX012 GE05969X012 NPT 37B5946X032 38A8848X032 CL150 RF 37B5947X032 38A8853X072 38A8872X052 38A8867X042 Chem ney steel CL300 RF 37B5948X032 38A8849X032 38A8871X052 38A8869X032 CL600 RF 37B5949X032 38A8844X032 38A8852X042 38A8866X032 DIN PN 16 25 40 RF GE05956X022 GE05960X022 GE05965X022 GE05969X022 CF3M Stainless steel CL150 RF 37B5947X102 38A8853K082 asss setckie E arbare NACE CL300 RF 37B5948X102 38A8849X122 38A8871X122 NPT 37B5946X022 38A8848X022 e eee eee eee wee
10. 324122 GG04933xX012 1P420706992 1L949306382 1P4207X0032 GE39171X012 GE39137X012 GG02195x012 GE39174xX012 GG02994xX012 GG02995xX012 GG02995xX022 GG02995x052 GE39329X012 GE39329X022 GE39329X052 1E7603X0062 1E7603X0072 T10990X0012 1A219235222 1A3465x0092 1A3465xX0102 1E9445x0502 1A337435252 1F 358106992 1F3581X0022 33B0301X012 33B0301X072 24A5680X012 24A5680X072 GG00833X012 GG00833X022 ERSA01471A0 ERSA01471A1 GG02988xX012 GG02988X022 GG00884x012 GG00884xX022 Key 64 65 66 67 68 69 70 71 72 73 74 76 81 82 84 85 87 Description Upper Casing O ring For Low and High Pressure Actuator Nitrile NBR Fluorocarbon FKM Cap Screw 10 required Steel Stainless steel NACE Spring Case Spacer Steel Stainless steel NACE Cap Screw 6 required Steel Stainless steel NACE Control Spring Steel Alloy For Low Pressure Actuator 5 to 14 psig 0 35 to 0 97 bar White 8 to 24 psig 0 55 to 1 7 bar Silver 12 to 30 psig 0 83 to 2 1 bar Orange 15 to 35 psig 1 0 to 2 4 bar Red For High Pressure Actuator 25 to 40 psig 1 7 to 2 8 bar Blue 35 to 70 psig 2 4 to 4 8 bar Green 55 to 120 psig 3 8 to 8 3 bar White 90 to 200 psig 6 2 to 13 8 bar Silver 175 to 300 psig 12 1 to 20 7 bar Red Upper Spring Seat NACE Zinc plated steel Spring Case Steel Stainless steel NACE Sealing Washer Steel Nitrile NBR Steel Fluorocarbon FKM J
11. 7 6 NPT 400 27 6 400 27 6 CL150 RF 245 16 9 245 16 9 CL300 RF WCC Steel 70 48 400 27 6 70 48 70 48 400 27 6 CL600 RF PN 16 RF 245 16 9 245 16 9 PN 16 25 40 RF 400 27 6 400 27 6 NPT 400 27 6 400 27 6 CL150 RF 225 15 5 225 15 5 CL300 RF s aas 70 4 8 400 27 6 70 4 8 70 4 8 400 27 6 tainless stee CL600 RF PN 16 RF 225 15 5 225 15 5 PN 16 25 40 RF 400 27 6 400 27 6 NPT 400 27 6 400 27 6 CL150 RF 185 12 7 185 12 7 CL300 RF St ERN 70 4 8 400 27 6 70 4 8 70 4 8 400 27 6 ainless steel CL600 RF PN 16 RF 185 12 7 185 12 7 PN 16 25 40 RF 400 27 6 400 27 6 1 Pressure ratings are based on a maximum operating temperature of 250 F 121 C 2 Maximum inlet outlet and emergency pressures for constructions with Fluorocarbon FKM diaphragm are limited to 230 psig 15 8 bar or the body rating limit whichever is lower Table 5 Type MR108 Product Assembly Torques TORQUE PART NAME AND KEY NUMBER eee a a Ft Lbs Nem Ft Lbs Nem Ft Lbs Nem Ft Lbs Nem Body Flange Studs and Nuts keys 3 and 29 75to95 102to129 50to65 68 to 88 100 to 130 136 to 176 160 to 210 217 to 285 Adaptor key 74 90 to 130 122 to 176 90 to 130 122 to 176 90 to 130 122 to 176 90 to 130 122 to 176 Actuator Stem Flanged Hex Nut key 41 16 to 18 22 to 24 16 to 18 22 to 24 16 to 18 22 to 24 16 to 18 22 to 24 Actuator Stem Jam Nuts key 48 12 to 14 16 to 19 12 to 14 16 to 19 12 t
12. 81X012 For NPS 3 DN 80 Body Size 14A5665X012 316 Stainless steel NACE 24A6781X022 For NPS 4 DN 100 Body Size 14A5650X012 316L Stainless steel NACE 24A6781X052 9 Valve Spring NACE For NPS 2 DN 50 Body Size Inconel X750 410 416 Stainless steel 24A5670X012 For NPS 1 DN 25 Body Size 11B6769X012 316 Stainless steel NACE 24A5670X022 For NPS 2 DN 50 Body Size 16A5501X012 316L Stainless steel NACE 24A5670X042 For NPS 3 DN 80 Body Size 16A5503X012 For NPS 3 DN 80 Body Size For NPS 4 DN 100 Body Size 16A5506X012 410 416 Stainless steel 24A5655X012 11 Cage NACE 316 Stainless steel NACE 24A5655X022 For NPS 1 DN 25 Body Size 316L Stainless steel NACE 24A5655X042 CF3M CF8M Stainless steel GF03315X012 For NPS 4 DN 100 Body Size For NPS 2 DN 50 Body Size 410 416 Stainless steel 24A5640X012 For Quick Open Cage Type GF03319X012 316 Stainless steel NACE 24A5640X022 For Quick Open Reduced Capacity Cage Type GG00814X012 316L Stainless steel NACE 24A5640X042 For NPS 3 DN 80 Body Size 14 Piston Ring NACE CF3M CF8M Stainless steel GF03311X012 PTFE For NPS 4 DN 100 Body Size For NPS 1 DN 25 Body Size 14A6786X012 CF3M CF8M Stainless steel GF03314X012 For NPS 2 DN 50 Body Size 14A5675X012 For NPS 3 DN 80 Body Size 14A5660X012 For NPS 4 DN 100 Body Size 14A5645xX012 Recommended spare part Inconel is a mark owned by Special Metals Corporation 17 Type MR108 Key Description 15 Upper Seal NACE For NPS 1 D
13. 92 1A369235072 1U7581X0022 1A767524662 1A767535072 1A398524182 1A398535072 1A398535082 GE39105xX012 GE39105X022 GE39106X012 GE39106X022 GE39107X012 GE39107X022 GE39108X012 GE39108X022 GG01972X012 GG01972X022 1L847828992 15A6002XN12 17A7112X012 17A7112X022 10782206992 1K756106382 107822X0052 Type MR108 L3 SEE DETAIL V 76 S 26 53 55 65 H L1 57 52 L1 H 64 66 L165 o 8 63 56 L1 58 84 SEE DETAIL X S 62 SEE DETAIL Z T4 L1 L1 HS1 NI 29 L1 s H61 L1 H3 411 L1 21 11 L1 L1H 40 12H L1 SEE DETAIL Y 16 13 L1 SEE DETAIL W L1 H17 3915 GE38436 NOTE KEYS 64 AND 71 ARE USED ONLY FOR PRESSURE LOADED ACTUATORS C APPLY LUBRICANT OR SEALANT L1 MULTI PURPOSE POLYTETRAFLUOROETHYLENE PTFE LUBRICANT L3 ANTI SEIZE COMPOUND S MULTI PURPOSE PTFE THREAD SEALANT 1 Lubricants and sealants must be selected such that they meet the temperature requirements Figure 4 Type MR108 Direct Operated Backpressure Regulator Assemblies Type MR108 Key Description 48 49 51 52 53 54 55 56 57 58 60 61 62 63 Jam Nut NACE 2 required Zinc plated steel Belleville Spring Washer NACE Lo
14. INE CONNECTION DIAPHRAGM M1179 VALVE PLUG 1 2 NPT CONTROL LINE CONNECTION DIAPHRAGM M1182 HE INLET PRESSURE EGE OUTLET PRESSURE GS ATMOSPHERIC PRESSURE T CAGE VALVE SPRING ACTUATOR STEM TYPE Y602 12 VENT ACTUATOR TYPE Y602 12 VENT POINTED DOWN OR 1 2 NPT PRESSURE LOADED SPRING CASE VENT CONTROL SPRING TYPE MR108 WITH LOW PRESSURE ACTUATOR Be CAGE VALVE SPRING ACTUATOR STEM TYPE Y602 12 VENT POINTED DOWN ACTUATOR TYPE Y602 12 VENT POINTED DOWN OR 1 2 NPT PRESSURE LOADED SPRING CASE VENT CONTROL SPRING TYPE MR108 WITH HIGH PRESSURE ACTUATOR Figure 2 Type MR108 Direct Operated Backpressure Regulator Operational Schematic Type MR108 Table 4 Maximum Inlet Outlet and Emergency Casing Pressures MAXIMUM INLET MAXIMUM OUTLET MAXIMUM EMERGENCY PRESSURE PRESSURE CASING PRESSURE BODY END 7 7 x MATERIAL CONNECTION Low Pressure High Pressure Low Pressure High Pressure Low Pressure High Pressure Actuator Actuator Actuator Actuator Actuator Actuator NPT 340 23 4 340 23 4 Cast Iron CL125 FF 70 4 8 175 12 1 70 4 8 70 4 8 175 12 1 CL250 RF 400 27 6 400 2
15. Instruction Manual Form 5875 October 2014 Type MR108 Type MR108 Direct Operated Backpressure Regulator Contents TROD U CUOM ais vaaiecet ies deceet saa pedeat jaaeeeeeetcaeedesteteigeeeenees Specifications ccccccecceeeeceeeeeeeeecceeeeeeeeeeeeeeeeeeees Principle of Operation cccceceeeeeeeeeeeeeseteteees lAstalatl ON eee nee a ee AGJUStIMONE oi 25 c2eceeecesteeseciteee cede O A SPUTA OWN e aaisa teinninn ea aa eaaa aiaa Maintenant accnnnnininiacnpina nni Pans ESTen e Ae E E Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion fire and or chemical contamination causing property damage and personal injury or death Fisher 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 a leak develops or if the outlet continually vents gas service to the unit may be required Failure to correct trouble could result in a hazardous condition Only a qualified person must install or service the unit www fisherregulators com TYPE MR108 WITH LOW PRESSURE ACTUATOR P1202 2 a P1203 TYPE MR108 WITH HIGH PRESSURE ACTUATOR Figure 1 Type MR108 Direct Operated Backpressure Regulators Installation operation and maintenance procedure
16. KM Ethylene Propylene EPDM NPS 1 DN 25 Body Size NPS 2 DN 50 Body Size NPS 3 DN 80 Body Size NPS 4 DN 100 Body Size Recommended spare part 18 Part Number 14A6789X012 14A8187X012 24A5674X012 25A7413X012 24A5659X012 25A7376X012 24A5644X012 25A7468X012 14A6789X022 24A5674X062 24A5659X062 24A5644X052 GE39093X012 GE39093X022 GE39093X032 GE39094xX012 GE39094xX022 GE39094X032 GE39095xX012 GE39095xX022 GE39095xX032 GE39096X012 GE39096xX022 GE39096X032 10A7777X012 10A7778X012 10A7779X012 10A7779X022 14A5688X012 14A5688X022 10A3481X012 10A3483X012 10A7777X022 10A7779X052 14A5688X082 10A3481X052 14A6981X012 14A8188X012 14A5686X012 14A5686X022 1V326906562 1V3269X0042 14A5688X012 14A5688X022 14A6981X032 14A5686X052 1V3269X0062 14A5688X082 Key Description 21 24 25 26 29 30 33 34 38 39 40 41 43 44 45 46 47 Adaptor O ring NACE For NPS 1 DN 25 Body Size Nitrile NBR Fluorocarbon FKM For NPS 2 3 and 4 DN 50 80 and 100 Body Sizes Nitrile NBR Fluorocarbon FKM Ethylene Propylene EPDM NPS 1 DN 25 Body Size NPS 2 3 and 4 DN 50 80 and 100 Body Sizes Drive Screw NACE 6 required 18 8 Stainless steel Flow Arrow NACE 18 8 Stainless steel Vent Assembly NACE Type Y602 12 2 required 1 required for Pressure Loaded Actuator Hex Nut For NPS 1 DN 25 Body Size 4 required Steel Stain
17. N 25 Body Size Nitrile NBR Fluorocarbon FKM For NPS 2 DN 50 Body Size Nitrile NBR Fluorocarbon FKM For NPS 3 DN 80 Body Size Nitrile NBR Fluorocarbon FKM For NPS 4 DN 100 Body Size Nitrile NBR Fluorocarbon FKM Ethylene Propylene EPDM NPS 1 DN 25 Body Size NPS 2 DN 50 Body Size NPS 3 DN 80 Body Size NPS 4 DN 100 Body Size 16 Valve Plug For NPS 1 DN 25 Body Size 416 Stainless steel 316 Stainless steel NACE 316L Stainless steel NACE For NPS 2 DN 50 Body Size 416 Stainless steel 316 Stainless steel NACE 316L Stainless steel NACE For NPS 3 DN 80 Body Size 416 Stainless steel 316 Stainless steel NACE 316L Stainless steel NACE For NPS 4 DN 100 Body Size 416 Stainless steel 316 Stainless steel NACE 316L Stainless steel NACE 17 Cage O ring NACE For NPS 1 DN 25 Body Size Nitrile NBR Fluorocarbon FKM For NPS 2 DN 50 Body Size Nitrile NBR Fluorocarbon FKM For NPS 3 DN 80 Body Size Nitrile NBR Fluorocarbon FKM For NPS 4 DN 100 Body Size Nitrile NBR Fluorocarbon FKM Ethylene Propylene EPDM NPS 1 DN 25 Body Size NPS 2 DN 50 Body Size NPS 3 DN 80 Body Size NPS 4 DN 100 Body Size 20 Valve Plug O ring NACE For NPS 1 DN 25 Body Size Nitrile NBR Fluorocarbon FKM For NPS 2 DN 50 Body Size Nitrile NBR Fluorocarbon FKM For NPS 3 DN 80 Body Size Nitrile NBR Fluorocarbon FKM For NPS 4 DN 100 Body Size Nitrile NBR Fluorocarbon F
18. am Nut NACE Steel Stainless steel Square Head Adjusting Screw NACE Steel Stainless steel Adaptor For NPS 1 DN 25 Body Size Steel Stainless steel NACE For NPS 2 3 and 4 DN 50 80 and 100 Body Sizes Steel Stainless steel NACE Pipe Bushing Steel Stainless steel NACE Pipe Nipple NACE Stainless steel Drain Valve NACE Stainless steel Internal Stiffener Plate Steel 316 Stainless steel NACE Bleed Valve Stainless steel NACE see Figure 3 1 8 NPT Upper Casing Welding Assembly Low Pressure Actuator only not shown Steel Stainless Steel 1 Meets chemical and physical requirements of NACE MR0175 2003 and NACE MR0103 for non pressure loaded applications only It is assumed that this part is not 20 Part Number 1P233206992 1P2332X0012 1A368424052 1A3684X0102 GG00877xX012 GG00877X022 104038X0062 104038X0032 GE42909X012 GE42910X012 GE42911X012 GE43002X012 GE42906X012 GE42907X012 GE42909X012 GE42910X012 GE43002X012 GG02175xX012 GG00917X012 GG00917X022 11A9681X012 11A9681X022 1A319224122 1A3192K0012 GG03609X012 GG03609X022 GG03677X012 GG03677X022 GG03679X012 GG03679X022 10379026232 103790X0012 10488238982 13B2392X082 ERSA00169A0 ERSA00169A1 15A6011XDG2 ERSA02584A0 ERSA02584A1 exposed to the sour gas Type MR108 73H L3 gt DOA GE38436
19. ator stem threads do not damage the O ring inside the lower diaphragm head Replace the lower diaphragm head O ring key 51 if necessary Remove the cap screws key 65 connecting the lower diaphragm casing key 62 and the internal stiffener plate key 84 to the bonnet key 61 Lift the lower casing off of the bonnet If it is desired to replace the bonnet and stem O rings keys 60 and 47 and bearings key 46 disconnect the control line attached to bonnet key 61 Unscrew the bonnet key 61 from the adaptor key 74 Remove stem key 40 from the bonnet by pulling on the end of the stem without threads Remove the wiper key 45 detail Z on the threaded orifice side end of the bonnet key 61 to reach the bearing key 46 and stem O ring key 47 Install the new stem O ring and bearing and put back the wiper Turn the bonnet key 61 over and install another stem O ring key 47 and bearing key 46 detail X in the top side of the bonnet Inspect the bonnet O ring key 60 installed in the groove located on the top surface of the bonnet key 61 for any damage and replace if necessary Personal injury equipment damage or leakage due to escaping fluid may result if the bonnet key 61 is backed off when installing control line Lubricate the bore on both ends of the bonnet key 61 Install it over the actuator stem key 40 and thread into the adaptor key 74 Tighten the bonnet into the body until the connecting p
20. control spring key 68 inside the hole in the upper diaphragm casing key 63 or upper casing welding assembly key 87 and over the lower spring guide key 52 The spring should be sitting on top of the diaphragm plate key 55 Lubricate the bore on the top of the upper spring seat key 69 where the adjusting screw key 73 will make contact Place the upper spring seat on top of the control spring key 68 Install the spring case key 70 over the control spring key 68 and upper spring seat key 69 and on top of the spring case spacer key 66 or upper casing welding assembly key 87 Align the holes in the spring case with the holes in the spring case spacer or upper casing welding assembly while ensuring the vent assembly key 26 is aligned with valve body inlet Lubricate cap screws key 67 and use them to secure the spring case key 70 to the spring case spacer key 66 or upper casing welding assembly key 87 Tighten the cap screws to a final torque of 25 to 28 ft lbs 34 to 38 Nem Personal injury equipment damage or leakage due to escaping fluid may result if adjusting screw key 73 and jam nut key 72 are not installed properly Also main spring key 68 may go solid resulting in the backpressure regulator not opening if jam nut is not installed and adjusting screw is adjusted completely down 26 Lubricate the adjusting screw key 73 and thread on the jam nut key 72 If a pressure loaded actuato
21. de with a screened vent Type Y602 12 vent connector The Type Y602 12 vent connector should be pointed down and protected as described in the Installation Location section Type MR108 Overpressure Protection Personal injury equipment damage or leakage due to escaping accumulated gas or bursting of pressure containing parts may result if this regulator is e Overpressured e Used with incompatible process fluid e Installed where service conditions could exceed the limits given in the Specifications section and on the appropriate nameplate or e Where conditions exceed any ratings of adjacent piping or piping connections To avoid such injury or damage provide pressure relieving or pressure limiting devices to prevent service conditions from exceeding those limits Overpressuring any portion of this equipment may result in equipment damage leaks in the backpressure regulator or personal injury due to bursting of pressure containing parts The system should be inspected after any overpressure condition Backpressure control ranges are from 5 to 300 psig 0 35 to 20 7 bar The individual spring range of your backpressure regulator is stamped on the nameplate Maximum inlet pressures depend upon body materials and temperatures See the Specifications section for the maximum inlet pressure of the valve The valve should be inspected for damage after any overpressure condition Startup To avoid possible personal inju
22. e the downstream shutoff valve to the regulator outlet Type MR108 Table 6 Type MR108 Trim Weights BODY SIZE TRIM WEIGHT TYPE NPS DN Ibs kg 1 25 74 34 2 50 79 36 MR108 Low Pressure Actuator 3 80 93 42 4 100 113 51 1 25 63 29 i 2 50 69 31 MR108 High Pressure Actuator 3 80 83 38 4 100 102 46 To avoid personal injury or damage of internal parts from a pressure loaded actuator carefully vent the regulator spring case pressure prior to inlet pressure 4 lf the actuator is pressure loaded vent the loading pressure slowly to release pressure in the spring case Note To avoid internal damage due to reverse pressurization of main valve components make certain backpressure regulator inlet pressure is bled prior to outlet pressure 5 Slowly open the downstream vent valve to vent downstream pressure 6 Leave the downstream vent valve open to vent inlet pressure and to release all remaining pressure in the regulator 7 If the regulator has the drain valve option slowly open valve to drain fluid inside valve body Make sure to close valve after fluid has been drained Maintenance Personal injury equipment damage or leakage due to escaping fluid may result if seals are not properly lubricated or maintained Due to normal part wear or damage that may occur from external sources this regulator should be inspected and maintained periodically The frequency of ins
23. eed valve option allows you to purge the air trapped underneath the diaphragm when the high pressure regulator is installed in the upright position Typical applications include lube oil cooling water and natural gas district stations Type MR108 backpressure regulators are typically used in lube response is critical minimum differential pressure is a concern or fluid is not free of impurities Principle of Operation Refer to Figure 2 The Type MR108 is a multi purpose backpressure regulator Inlet pressure is registered externally through a 1 2 NPT control line connection located at the low pressure actuator bonnet or high pressure actuator lower casing When inlet pressure rises above the set pressure the pressure under the actuator diaphragm increases and opens the regulator This pressure overcomes the regulator setting which is set by the regulator control spring Through the action of the actuator stem the valve plug is pulled upward moving away from the seat ring and allowing fluid to escape through the cage into the downstream system When inlet pressure drops back to set pressure pressure under the actuator diaphragm decreases The control spring and valve spring forces push the actuator stem downward the valve plug moves closer to the seat ring and the flow decreases downstream as the regulator closes in response to the decreased pressure underneath the diaphragm Type MR108 VALVE PLUG 1 2 NPT CONTROL L
24. eee ee eee WCC Steel CL150 RF 37B5947X022 38A8853X052 38A8872X062 38A8867X032 NACE CL300 RF 37B5948X022 38A8849X022 38A8871X042 38A8869X022 CL600 RF 37B5949X022 38A8844X022 38A8852X032 38A8866X022 Key Description Part Number Key Description Part Number 2 Body Flange continued 12 Port Seal NACE For NPS 4 DN 100 Body Size For NPS 1 DN 25 Body Size WCC Steel GE39058x012 Nitrile NBR 14A6788X012 CF8M Stainless steel NACE GE39058X022 Fluorocarbon FKM 14A8186X012 3 Stud Bolt For NPS 2 DN 50 Body Size For NPS 1 DN 25 Body Size 4 required Nitrile NBR 24A5673X012 Steel 1R2848X0752 Fluorocarbon FKM 25A7412X012 Stainless steel NACE 1R284835222 For NPS 3 DN 80 Body Size For NPS 2 DN 50 Body Size 8 required Nitrile NBR 24A5658X012 Steel 1K2429X0782 Fluorocarbon FKM 25A7375X012 Stainless steel NACE 1K242935222 For NPS 4 DN 100 Body Size For NPS 3 DN 80 Body Size 8 required Nitrile NBR 24A5643X012 Steel 1A3781X0562 Fluorocarbon FKM 25A7469X012 Stainless steel NACE 1A378135222 Ethylene Propylene EPDM For NPS 4 DN 100 Body Size 8 required NPS 1 DN 25 Body Size 14A6788X022 Steel 1R3690X0592 NPS 2 DN 50 Body Size 24A5673X062 Stainless steel NACE 1R369035222 NPS 3 DN 80 Body Size 24A5658X062 4 Gasket NACE NPS 4 7 DN 100 Body Size 24A5643X052 Composition 13 Seat Ring For NPS 1 DN 25 Body Size 14A6785xX012 For NPS 1 DN 25 Body Size For NPS 2 DN 50 Body Size 14A5685X012 410 416 Stainless steel 24A67
25. er diaphragm Personal injury equipment damage or casing key 63 for High Pressure Actuator leakage due to escaping fluid may result if regulator bolts are not tightened to 3 Remove the upper spring seat key 69 and proper load Always tighten bolts in an control spring key 68 Replace the control spring alternating pattern if desired 4 For pressure loaded spring case replace the upper 7 Install the body flange on the body key 1 and casing welding assembly top O ring Low Pressure secure it evenly with the stud bolts key 3 Tighten Actuator or diaphragm casing High Pressure to torque value specified in Table 5 Actuator O ring key 64 if necessary Install the new O ring in the groove on the top surface Actuator Maintenance of the upper casing welding assembly key 87 for Low Pressure Actuator or upper diaphragm N WARNING casing key 63 for High Pressure Actuator If this is performed only for spring key 68 and spring case spacer upper diaphragm casing O ring replacement and no further maintenance in the actuator and its internal parts is necessary proceed to step 23 for Low Pressure Actuator or step 20 for High Pressure Actuator Equipment damage leakage and personal injury from escaping fluid may occur if external side forces are applied to the actuator Do not stand on the actuator or apply external loads to the actuator For Low Pressure Actuator Diaphragm Replacement Perform this procedure if it is desi
26. erve 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 2010 2014 All Rights Reserved Ss EMERSON
27. f the diaphragm should be pointing up Place the following over the actuator stem key 40 and on top of the diaphragm key 56 in the following order diaphragm plate key 55 lower spring guide key 52 and Belleville spring washer key 49 The raised inner diameter of the Belleville spring washer should be pointing toward the threaded end of the actuator stem Lubricate the threads of the actuator stem key 40 and thread the two jam nuts key 48 onto it Using wreckflats hold the stem and torque the jam nuts individually Tighten to a torque of 12 to 14 ft lbs 16 to 19 Nem Type MR108 20 21 22 23 24 25 Note For pressure loaded actuator option skip steps 20 and 21 and proceed to step 22 with upper casing welding assembly key 87 Install the upper diaphragm casing key 63 or spring case spacer key 66 assembly while aligning the bolt circle holes in the upper diaphragm casing diaphragm key 56 and lower diaphragm casing key 62 Note Exercise care to ensure that the diaphragm key 56 is not pinched twisted or wrinkled while compressing between the upper and lower diaphragm casings keys 62 and 63 Lubricate the cap screws key 57 and nuts key 58 and carefully insert through holes in the outer flange of the diaphragm casings keys 62 and 63 and diaphragm key 56 Tighten the cap screws to the hex nuts to a final torque value of 27 to 29 ft lbs 37 to 39 Nem Place the
28. her foreign material that may plug the vent or vent line On outdoor installations point the spring case vent downward to allow condensate to drain Under enclosed conditions or indoors escaping gas may accumulate and be an explosion hazard In these cases the vent should be piped away from the regulator to the outdoors Note To avoid premature wear of internal parts it is recommended that the actuator be oriented up or down in liquid service as shown in Figures 2 and 3 General Installation Instructions Escaping process fluid from an open bleed valve may result in regulator damage personal injury and property damage To avoid such injury and damage make certain the bleed valve if used is properly closed after venting air Always open bleed valves slowly These valves contain no packing so some fluid weepage will occur when the valves are opened Operating personnel must protect themselves from exposure to system fluids Note A linear cage is recommended for applications where low flow stability is a concern but it will limit the overall capacity of the regulator Vertical installation with the actuator installed directly above or below the main valve is recommended but for optimal performance the actuator should be installed below the main valve The use of a bleed valve is recommended for liquid installations that require the high pressure actuator to be mounted above the main valve The unit will operate
29. ipe holes in the bonnet are located 90 from the valve body ends for correct tubing alignment Do not loosen the bonnet thread to align the pipe holes Always tighten the bonnet to make alignment for the control line 15 16 17 18 19 Type MR108 Note Position the bonnet key 61 such that the vent key 26 is facing valve body key 1 inlet the lube fitting key 44 is facing body outlet end and the 1 2 NPT control line connection key 30 is located 90 from the valve body ends Note Exercise care to ensure that the actuator stem key 40 enters and exits the bonnet bore without pinching cutting or damaging the actuator stem O rings key 47 Lubricate the cap screws key 65 and use it to position and secure the lower diaphragm casing key 62 and internal stiffener plate key 84 to the bonnet key 61 Tighten the cap screws toa torque of 10 to 12 ft lbs 14 to 16 Nem The serrated side of the lower diaphragm head key 53 should be facing up toward the threaded end of the actuator stem Carefully install the lower diaphragm head key 53 over the actuator stem key 40 Note Exercise care to ensure that the actuator stem key 40 enters and exits the lower diaphragm head bore without pinching cutting or damaging in any way the lower diaphragm head O ring key 51 Place the diaphragm key 56 over the actuator stem key 40 and on top of the lower diaphragm head key 53 The convolutions o
30. key 11 plus upper seal key 15 and cage O ring key 17 into the body flange and then install the seat ring key 13 plus port seal key 12 into the cage Use the valve body key 1 as a holding fixture if desired Flip the body flange key 2 over and anchor it on the valve body Insert a wrench handle or similar tool into the seat ring slots for leverage when tightening the seat ring and cage 6 Remove the upside down body flange key 2 if it was anchored on the body Lightly lubricate the cage seating surfaces of the valve body web and Type MR108 the body flange Install the valve spring key 9 and Replacing Main Spring install the actuator on the body flange by screwing the adaptor 90 to 130 ft lbs 122 to 176 Nem into 1 Loosen the jam nut key 72 If a pressure loaded the body flange The stem will protrude through actuator is used remove the sealing washer the center hole of the valve plug key 16 Install key 71 Using a hand wrench not an impact and tighten 16 to 18 ft lbs 22 to 24 Nem the gun unscrew the adjusting screw key 73 and flange nut key 41 to the stem Use the wrench remove it from the spring case key 70 flats on the stem to keep the stem from rotating Ovbousan and remove the cap sorna kay oand lift off the spring case key 70 from the spring case N WARNING spacer key 66 for Low Pressure Actuator upper casing welding assembly key 87 for Low Pressure Pressure Loaded Actuator or upp
31. less steel NACE For NPS 2 DN 50 Body Size 8 required Steel Stainless steel NACE For NPS 3 DN 80 Body Size 8 required Steel Stainless steel NACE For NPS 4 DN 100 Body Size 8 required Steel Stainless steel NACE Pipe Plug 1 2 NPT Steel Stainless steel NACE NACE Tag 18 8 Stainless steel Wire Seal 304 Stainless steel NACE Pipe Plug 1 4 NPT Steel Stainless steel NACE Pipe Plug 1 2 NPT For All Body Sizes Zinc 316 Stainless steel NACE For NPS 1 2 and 3 DN 25 50 and 80 Body Sizes 316L Stainless steel NACE Stem Actuator For NPS 1 DN 25 Body Size S 17400 Stainless steel 20910 Stainless steel NACE For NPS 1 DN 25 Body Size For NPS 2 DN 50 Body Size S817400 Stainless steel 20910 Stainless steel NACE For NPS 3 DN 80 Body Size S817400 Stainless steel 20910 Stainless steel NACE For NPS 4 DN 100 Body Size 17400 Stainless steel 20910 Stainless steel NACE Flange Nut 17400 Stainless steel 20910 Stainless steel NACE Nameplate Lube Fitting NACE Carbon plated steel Wiper Ring NACE Bearing NACE 2 required Nylon PA Nyliner Valve Stem O ring NACE 2 required Nitrile NBR Fluorocarbon FKM Ethylene Propylene EPDM Part Number 10A8931X012 10A0811X012 10A3800X012 1R727606382 10A8931X022 10A3800X042 1A368228982 Y602X1 A12 103306X0832 10330635252 1A3772X0892 1A377235252 1A3760X0832 1A376035252 1A3520X0922 1A352035252 1A3692244
32. ng Remove the lower diaphragm casing key 62 by unthreading it from the adaptor key 74 Remove stem key 40 from the lower casing by pulling on the end of the stem without threads Remove the wiper ring key 45 detail Z on the threaded end of the lower diaphragm casing key 62 to reach the bearing and stem O ring keys 46 and 47 Install the new stem O ring and bearing and put back the wiper Turn the lower diaphragm casing key 62 over and install another stem O ring and bearing keys 47 and 46 in the top side of the lower casing Lubricate the bore on both ends of the lower diaphragm casing key 62 Install the lower casing over the actuator stem key 40 and thread into the valve body key 1 Tighten the lower casing into the body until the connecting pipe holes in the casing are located 90 from the valve body ends for correct tubing alignment Do not loosen the bonnet thread to align the pipe holes Always tighten the lower casing to make alignment for the control line Note Position the lower diaphragm casing key 62 such that the vent key 26 is facing valve body key 1 inlet the lube fitting key 44 is facing body outlet end and the 1 2 NPT control line connection key 30 is located 90 from the valve body ends Note Exercise care to ensure that the actuator stem key 40 enters and exits the casing bore without pinching cutting or damaging the actuator stem O rings key 47 14 The serrated
33. ng screw is adjusted completely down 24 Lubricate the adjusting screw key 73 and thread on the jam nut key 72 If a pressure loaded actuator is used install the sealing washer key 71 Lubricate the adjusting screw and place it into the spring case key 70 Thread the adjusting screw using a hand wrench not an impact gun until it touches the upper spring seat key 69 Regulator Reassembly As indicated by the square callouts in Figure 4 it is recommended that a good quality pipe thread sealant be applied to pressure connections and fittings and a good quality lubricant be applied to O rings Also apply an anti seize compound to the adjusting screw threads and other areas as needed After repair the back pressure regulator should be tested for proper operation before being put back into service Parts Ordering When corresponding with your local Sales Office about this regulator always reference the equipment serial number or FS number found on the nameplate When ordering replacement parts reference the key number of each needed part as found in the following parts list Separate kits containing all recommended spare parts are available Parts List Use only genuine Fisher replacement parts Components that are not supplied by Emerson should not under any circumstances be used in any Fisher regulator because they will void your warranty might adversely affect the performance of the valve and could give
34. o 14 16 to 19 12 to 14 16 to 19 Low Pressure Actuator Flange Cap Screws and Nuts keys 57 and 58 27 to 29 37 to 39 27 to 29 37 to 39 27 to 29 37 to 39 27 to 29 37 to 39 High Pressure Actuator Flange Studs and Nuts keys 57 and 58 Bonnet and Spring Case Spacer Cap Screws key 65 10 to 12 14 to 16 10 to 12 14 to 16 10 to 12 14 to 16 10 to 12 14 to 16 45 to 55 61 to 75 45 to 55 61 to 75 45 to 55 61 to 75 45 to 55 61 to 75 Spring Case Cap Screws key 67 25 to 28 34 to 38 25 to 28 34 to 38 25 to 28 34 to 38 25 to 28 34 to 38 Note All studs screws and nuts should be lubricated All final torque values should be verified with a calibrated torque wrench Type MR108 Installation Personal injury or system damage may result if this regulator is installed without appropriate overpressure protection where service conditions could exceed the limits given in the Specifications section and or regulator nameplate Refer to Overpressure Protection section for recommendations on how to prevent service conditions from exceeding those limits Additionally physical damage to the regulator may result in personal injury or property damage due to escaping of accumulated gas To avoid such injury and damage install the regulator in a safe location All vents should be kept open to permit free flow of gas to the atmosphere Protect openings against entrance of rain snow insects or any ot
35. om other external sources e Install the regulator with the vent pointed vertically down see Figures 2 and 3 If the vent cannot be installed in a vertically down position the regulator must be installed under a separate protective cover Installing the regulator with the vent down allows condensate to drain minimizes the entry of water or other debris from entering the vent and minimizes vent blockage from freezing precipitation e Do not install the Type MR108 in a location where there can be excessive water accumulation or ice formation such as directly beneath a downspout gutter or roof line of building Even a protective hood may not provide adequate protection in these instances e Install the regulator so that any gas discharge through the vent or vent assembly is over 3 ft 0 9 m away from any building opening Periodically check all vent openings to be sure that they are not plugged Regulators Subjected to Heavy Snow Conditions To protect against precipitation make certain that the vents are oriented such that the opening does not allow precipitation to enter vents Some installations such as in areas with heavy snowfall may require a hood or enclosure to protect the regulator from snow load and vent freeze over Type MR108 Upstream Control Line Installation Personal injury equipment damage or leakage due to escaping fluid may result if the bonnet key 61 Low Pressure Actuator or lower diaph
36. pection maintenance and replacement of parts depends upon the severity of service conditions or the requirements of local state and federal regulations 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 regulators Restart gas utilization equipment according to normal startup procedures Note To protect against reduced performance ensure vents are not plugged when conducting routine maintenance Annual Maintenance The stem O rings on the Type MR108 actuator can be lubricated during regularly scheduled maintenance using the grease fitting key 44 Stem O rings can be checked for damage during normal operation If line pressure leakage or unexpected grease extrusion from the actuator vent key 26 is observed during normal operation the stem O ring needs to be replaced Change Nameplate Be certain that the nameplates are updated to accurately indicate any field changes in equipment materials service conditions or pressure settings Disassembly To avoid personal injury resulting from sudden release of pressure isolate the regulator from all pressure and cautiously release trapped pressure from the regulator before attempting disassembly Instructions are given below for disassembly of the Type MR108 backpressure regulators Suitable lubricants are indicated on the as
37. r is used install the sealing washer key 71 Lubricate the adjusting screw and place it into the spring case key 70 Thread the adjusting screw using a hand wrench not an impact gun until it touches the upper spring seat key 69 Set the regulator to the desired set pressure according to the Adjustment procedure For High Pressure Actuator Diaphragm Replacement 5 Remove the cap screws key 57 and hex nuts key 58 connecting the diaphragm casings keys 62 and 63 and diaphragm key 56 Lift off the upper diaphragm casing key 63 Unscrew the jam nuts key 48 detail V and remove them from the actuator stem key 40 Remove the Belleville spring washer key 49 and lower spring seat key 54 from the actuator stem key 40 Lift off the diaphragm key 56 from the actuator stem key 40 and inspect it for damage Replace if necessary If no further maintenance or inspection is required proceed to step 15 Note Exercise care to ensure that the actuator stem key 40 enters and exits the lower diaphragm head bore without pinching cutting or damaging in any way the lower diaphragm head O ring key 51 Carefully remove the lower diaphragm head key 53 from the actuator stem key 40 Replace the lower diaphragm head O ring key 51 if necessary 10 11 12 13 If it is desired to replace the stem O rings and bearings keys 47 and 46 details X and Z disconnect the control line tubi
38. ragm casing key 62 High Pressure Actuator is backed off or loosened when installing control line The Type MR108 backpressure regulator requires an upstream control line to allow inlet pressure to register on the actuator s diaphragm to ensure proper pressure control A 1 2 NPT control line connection is located on the bonnet for low pressure actuator see Figure 2 or on the lower diaphragm casing for high pressure actuator see Figure 2 The control line should be installed four to eight pipe diameter before the backpressure regulator and in an area of pipe that is free of turbulence Connect the upstream control line tubing to the bonnet or lower casing and run the tubing approximately 20 in 0 5 m upstream For best results the outer diameter of the control line tubing should be 3 8 in 9 5 mm or larger Vent Line Installation The Type MR108 backpressure regulator has a 1 2 NPT vent opening in the spring case When installed inside a building or if it is necessary to vent escaping gas away from the regulator install a remote vent line in the spring case tapping Vent piping should be as short and direct as possible with a minimum number of bends and elbows The remote vent line should be at least 1 2 in 13 mm outer diameter tubing or 1 2 NPT pipe Remove the Type Y602 12 vent and the pipe bushing key 76 Figure 4 and attach the vent line at this location The other end of the vent line should be located outsi
39. re Actuator 120 psig 8 3 bar Maximum Differential Pressures Low Pressure Actuator 70 psig 4 8 bar High Pressure Actuator 400 psig 27 6 bar or maximum inlet pressure whichever is lower Material Temperature Capabilities Nitrile NBR 20 to 180 F 29 to 82 C Fluorocarbon FKM 20 to 250 F 7 to 121 C Ethylene Propylene EPDM 20 to 225 F 29 to 107 C Flow and Sizing Coefficients See Table 3 Pressure Registration External Upstream Control Line Connection Size 1 2 NPT Spring Case Vent Type Y602 12 Pressure Loaded Spring Case Vent Connection 1 2 NPT Approximate Weights For Type MR108 with Low Pressure Actuator NPS 1 DN 25 88 Ibs 40 kg NPS 2 DN 50 118 Ibs 54 kg NPS 3 DN 80 167 Ibs 76 kg NPS 4 DN 100 176 lbs 80 kg For Type MR108 with High Pressure Actuator NPS 1 DN 25 78 lbs 35 kg NPS 2 DN 50 107 Ibs 49 kg NPS 3 DN 80 156 Ibs 71 kg NPS 4 DN 100 166 lbs 75 kg Options e Inlet Pressure Gauge Tap on Body e Pressure Loaded Actuator e Drain Valve e NACE Construction e Bleed Valve for High Pressure Actuator Only e Ethylene Propylene EPDM Elastomer Trim Parts 1 The pressure temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded 2 Fluorocarbon FKM is limited to 200 F 93 C in hot water 3 Ethylene Propylene EPDM is limited to 20 to 225 F 7 to 107 C when used with Low Pressure Actuator Table 1 Body Si
40. red to inspect or replace the diaphragm or other internal parts or if it is desired to change the set pressure range of the regulator by changing the control spring 5 Remove the cap screws key 57 and hex nuts key 58 connecting the casings key 63 or 87 and 62 and diaphragm key 56 Lift off the upper diaphragm casing key 63 or upper casing welding assembly key 87 N WARNING 6 Unscrew the jam nuts key 48 and remove them from the actuator stem key 40 To avoid possible personal injury from 7 spring or pressure loaded actuator make certain the adjusting screw is completely backed off or the spring case pressure is Remove the Belleville spring washer key 49 lower spring guide key 52 and diaphragm plate key 55 from the actuator stem key 40 vented prior to disassembly Otherwise 8 Lift off the diaphragm key 56 from the actuator the spring load or loading pressure could stem key 40 and inspect it for damage Replace forcefully eject the spring case if necessary If no further maintenance or inspection is required proceed to step 18 to reassemble the actuator 9 10 11 12 13 14 Note Exercise care to ensure that the actuator stem key 40 enters and exits the lower diaphragm head bore without pinching cutting or damaging in any way the lower diaphragm head O ring key 51 Carefully remove the lower diaphragm head key 53 from the actuator stem key 40 so that the actu
41. ry equipment damage or leakage due to escaping fluid make certain the regulator is installed as instructed in the Installation section Pressure gauges must always be used to monitor downstream pressure during Startup Check that proper installation is completed and downstream equipment has been properly adjusted 2 Make sure all block and vent valves are closed 3 Slowly open the valves in the following order a Loading supply and control line valve s if used b Inlet shut off valve c Outlet shut off valve 4 If the regulator has the bleed valve option slowly open valve to allow air to escape from lower casing Once fluid starts to bleed out close valve The regulator is factory set as specified on the order or at the midpoint of the spring range The allowable spring range is stamped on the nameplate If a pressure setting other than the one specified is desired be sure to change the pressure setting by following the Adjustment procedure 4 If resetting setpoint then set the regulator to the desired set pressure according to the Adjustment procedure Adjustment Key numbers are referenced in Figure 4 Personal injury equipment damage or leakage due to escaping fluid may result if adjusting screw key 73 and jam nut key 72 are not installed properly Also spring key 68 may go solid resulting in the backpressure regulator not opening if jam nut is not installed and adjusting screw is adjusted
42. s performed by unqualified personnel may result in improper adjustment and unsafe operation Either condition may result in equipment damage or personal injury Use qualified personnel when installing operating and maintaining the Type MR108 backpressure regulator Note To avoid cavitation it is recommended that the customer follow the bulletin capacity sizing guidelines found in Bulletin 71 4 MR108 EMERSON D103247X012 Type MR108 Specifications The Specifications section on this page provides the ratings and other specifications for the Type MR108 The following information is stamped on the nameplate fastened on the regulator at the factory type body size maximum inlet outlet and differential pressure maximum pressure above setpoint maximum casing pressure maximum temperature spring range cage type and trim and diaphragm material Body Sizes and End Connection Styles See Table 1 Shutoff Classification Per ANSI FCI 70 3 2004 Class VI Soft Seat Maximum Inlet Outlet and Emergency Casing Pressure See Table 4 Backpressure Control Range 5 to 300 psig 0 34 to 20 7 bar See Table 2 Maximum Setpoint Low Pressure Actuator 35 psig 2 4 bar High Pressure Actuator Nitrile NBR and Ethylene Propylene EPDM Diaphragm 300 psig 20 7 bar Fluorocarbon FKM Diaphragm 150 psig 10 3 bar Maximum Pressure Over Setpoint to Avoid Internal Parts Damage Low Pressure Actuator 20 psig 1 4 bar High Pressu
43. sembly drawings Apply the lubricants as the backpressure regulator is being reassembled All O rings gaskets and seals should be lubricated with a good grade of general purpose lubricant and installed gently rather than forced into position Refer to Figure 4 while servicing the backpressure regulator For a summary of maximum torque values required for all studs screws and nuts refer to Table 5 Failure to properly follow maintenance installation procedures when replacing parts could result in regulator damage personal injury and property damage from escaping process fluid or regulators separation during testing or after reinstallation in the pipe line Replacing Trim Parts Perform this procedure when inspecting cleaning or replacing individual trim package parts Note All disassembly trim change and reassembly steps in this section may be performed with the regulator in the main line The trim for the NPS 3 and NPS 4 DN 80 and 100 body sizes see Table 6 is heavy and may be awkward to remove or reinstall in some valve Type MR108 pipeline orientations Follow your company policy for lifting and handling heavy parts 1 Loosen the hex nuts key 29 and stud bolts key 3 remove the body flange key 2 from the valve body key 1 and lift out the trim package 2 Perform any required inspection cleaning or maintenance on the exposed surfaces of the valve body key 1 or trim package Replace the gaske
44. t key 4 or cage O ring key 17 as necessary 3 To gain access to the port seal key 12 upper seal key 15 detail Y or valve plug parts unscrew the flange nut key 41 detail W from the stem key 40 Use the wrench flats on the stem to keep the stem from rotating Unscrew the adaptor key 74 from the body flange key 2 Lift the actuator off the body flange and remove the valve spring key 9 Unscrew the seat ring key 13 from the cage key 11 and the cage from the body flange key 2 For leverage a wrench handle or similar tool may be inserted into the seat ring slots and a strap wrench may be wrapped around the cage or a soft bar may be inserted through the windows of a standard cage To remove the piston ring key 14 and or plug O ring key 20 remove the valve plug key 16 from the body flange insert a screwdriver into the pre cut fold over area of the piston ring and unfold the piston ring 4 Replace parts such as the gasket key 4 and cage O ring key 17 if worn or damaged Making sure that the port seal key 12 and upper seal key 15 were removed install new port seal key 12 and upper seal key 15 in their retaining slots with the grooved sides facing out Lightly lubricate seating surfaces and parts as necessary for ease of installation 5 Install the plug O ring key 20 and piston ring key 14 onto the valve plug key 16 Insert the valve plug into the body flange key 2 install the cage
45. wer Diaphragm Head O ring NACE Nitrile NBR Fluorocarbon FKM Ethylene Propylene EPDM Lower Spring Guide NACE Zinc plated steel Lower Diaphragm Head NACE 17400 Stainless steel For Low Pressure Actuator For High Pressure Actuator Lower Spring Seat NACE Zinc plated steel Diaphragm Plate NACE Cast Iron Diaphragm NACE For Low Pressure Actuator Nitrile NBR Nylon PA Fluorocarbon FKM Nylon PA Ethylene Propylene EPDM For High Pressure Actuator Nitrile NBR Nylon PA Fluorocarbon FKM Nomex Ethylene Propylene EPDM Cap Screw For Low Pressure Actuator 16 required Steel Stainless steel NACE For High Pressure Actuator 8 required Steel Stainless steel NACE Hex Nut For Low Pressure Actuator 16 required Steel Stainless steel NACE For High Pressure Actuator Steel 8 required Stainless steel 16 required NACE Bonnet O ring NACE Nitrile NBR Fluorocarbon FKM Bonnet Steel Stainless steel NACE Lower Diaphragm Casing For Low Pressure Actuator Steel Stainless steel NACE High Pressure Actuator Steel CF3M CF8M Stainless steel NACE High Pressure Actuator with 1 8 NPT Tap for Bleed Valve optional Steel CF3M CF8M Stainless steel NACE Upper Diaphragm Casing For Low Pressure Actuator Steel Stainless steel NACE For High Pressure Actuator Steel Stainless steel NACE Recommended spare part Nomex is a mark owned by E I du Pont de Nemours and Co Part Number 1A946
46. zes and End Connection Styles aa Gane END CONNECTION STYLES NPS 1 and 2 DN 25 and 50 Body Sizes NPS 3 and 4 DN 80 and 100 Body Sizes Cast Iron NPT CL125 FF or CL250 RF CL125 FF or CL250 RF Riek Sass NPT CL150 RF CL300 RF CL600 RF CL150 RF CL300 RF CL600 RF or PN 16 25 40 RF or PN 16 RF NPT CL150 RF CL300 RF CL600 RF CL150 RF CL300 RF CL600 RF 1X2 y 3 Cre Stainless sice or PN 16 25 40 RF or PN 16 RF NPT CL150 RF CL300 RF CL600 RF CL150 RF CL300 RF CL600 RF 1X2 GFSM Stainigss Steel or PN 16 25 40 RF or PN 16 RF 1 Optional NACE construction available 2 Constructions meet API 614 requirements Table 2 Backpressure Control Ranges Type MR108 MAXIMUM PRESSURE SPRING SPRING WIRE SPRING FREE OVER SETPOINT TO eee SPRING RANGE Sl ane COLOR DIAMETER LENGTH AVOID INTERNAL CODE PARTS DAMAGE psig bar In mm In mm psig bar 5 to 14 0 34 to 0 97 GE42909X012 White 0 44 11 2 Low Pressure 8 to 24 0 55 to 1 7 GE42910X012 Silver 0 50 12 7 20 14 12 to 30 0 83 to 2 1 GE42911X012 Orange 0 56 14 2 15 to 35 1 0 to 2 4 GE43002X012 Red 0 63 16 0 25 to 40 1 71028 GE42906X012 Blue 0 33 8 38 9 70 246 35 to 70 2 4 to 4 8 GE42907X012 Green 0 38 9 65 High Pressure 55 to 120 3 8 to 8 3 GE42909X012 White 0 44 11 2 120 8 3 90 to 200 6 2 to 13 8 GE4291
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