Instruction manual

ManualsBrandsEmerson Manualsmotor vehicle accessories & componentsMR108

Type MR108

Instruction Manual

Form 5875

October 2014

D103247X012

www.fisherregulators.com

Type MR108 Direct-Operated

Backpressure Regulator

WARNING

Failure to follow these instructions or

to properly install and maintain this

equipment could result in an explosion,



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



install or service the unit.

Installation, operation and maintenance



personnel may result in improper

adjustment and unsafe operation. Either

condition may result in equipment



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.

Figure 1. Type MR108 Direct-Operated Backpressure Regulators

Contents

Introduction ............................................................... 3

Speci cations ........................................................... 2

Principle of Operation ............................................... 3

Installation ................................................................ 6

Overpressure Protection........................................... 8

Startup ...................................................................... 8

Adjustment ............................................................... 8

Shutdown.................................................................. 9

Maintenance ............................................................. 10

Parts List................................................................... 16

TYPE MR108 WITH

LOW-PRESSURE ACTUATOR

TYPE MR108 WITH

HIGH-PRESSURE ACTUATOR

P1202

P1203

Summary of content (24 pages)

PAGE 1
Type MR108 Instruction Manual Form 5875 October 2014 Type MR108 Direct-Operated Backpressure Regulator Contents Introduction ............................................................... 3 Specifications ........................................................... 2 Principle of Operation ............................................... 3 Installation ................................................................ 6 Overpressure Protection........................................... 8 Startup ............
PAGE 2
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.
PAGE 3
Type MR108 Table 2. Backpressure Control Ranges Spring Range Actuator Type Low Pressure High Pressure Spring Part Number Spring Color code Spring Wire Diameter psig bar In. mm 5 to 14 0.34 to 0.97 GE42909X012 White 0.44 11.2 8 to 24 12 to 30 15 to 35 25 to 40 35 to 70 55 to 120 90 to 200(1) 175 to 300(2) 0.55 to 1.7 0.83 to 2.1 1.0 to 2.4 1.7 to 2.8 2.4 to 4.8 3.8 to 8.3 6.2 to 13.8(1) 12.1 to 20.
PAGE 4
Type MR108 CAGE VALVE PLUG VALVE SPRING ACTUATOR STEM TYPE Y602-12 VENT 1/2 NPT CONTROL LINE CONNECTION DIAPHRAGM ACTUATOR TYPE Y602-12 VENT POINTED DOWN OR 1/2 NPT PRESSURE-LOADED SPRING CASE VENT Control spring M1179 type MR108 with low-pressure actuator CAGE VALVE PLUG VALVE SPRING ACTUATOR STEM TYPE Y602-12 VENT POINTED DOWN 1/2 NPT CONTROL LINE CONNECTION ACTUATOR DIAPHRAGM TYPE Y602-12 VENT POINTED DOWN OR 1/2 NPT PRESSURE-LOADED SPRING CASE VENT Control spring M1182 inlet pressure outl
PAGE 5
Type MR108 Table 4. Maximum Inlet, Outlet and Emergency Casing Pressures(1) Body Material end connection Maximum Inlet Pressure WCC Steel CF8M Stainless steel CL125 FF High-Pressure Actuator(2) Low-Pressure Actuator High-Pressure Actuator(2) Low-Pressure Actuator High-Pressure Actuator(2) psig bar psig psig bar psig psig bar psig 340 23.4 340 23.4 340 23.4 70 4.8 175 12.1 70 4.8 175 12.1 70 4.8 175 12.1 27.6 bar bar bar CL250 RF 400 27.6 400 27.
PAGE 6
Type MR108 Installation ! Warning 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.
PAGE 7
Type MR108 Installation Location caution 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. • The installed regulator should be adequately protected from vehicular traffic and damage from other external sources.
PAGE 8
Type MR108 Overpressure Protection ! Warning Pressure gauges must always be used to monitor downstream pressure during Startup. Personal injury, equipment damage or leakage due to escaping accumulated gas or bursting of pressure-containing parts may result if this regulator is: 1. Check that proper installation is completed and downstream equipment has been properly adjusted. • Overpressured; 3. Slowly open the valves in the following order: 2. Make sure all block and vent valves are closed.
PAGE 9
Type MR108 1/8 NPT INLET BLEED VALVE (KEY 85) DRAIN VALVE (KEY 82) 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.
PAGE 10
Type MR108 Table 6. Type MR108 Trim Weights BODY Size Type MR108 Low-Pressure Actuator MR108 High-Pressure Actuator ! DN lbs kg 1 25 74 34 2 50 79 36 3 80 93 42 4 100 113 51 1 25 63 29 2 50 69 31 3 80 83 38 4 100 102 46 Warning 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.
PAGE 11
Type MR108 Disassembly ! Warning 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 assembly drawings. Apply the lubricants as the backpressure regulator is being reassembled.
PAGE 12
Type MR108 the body flange. Install the valve spring (key 9) and install the actuator on the body flange by screwing the adaptor (90 to 130 ft-lbs / 122 to 176 N•m) into the body flange. The stem will protrude through the center hole of the valve plug (key 16). Install and tighten (16 to 18 ft-lbs / 22 to 24 N•m) the flange nut (key 41) to the stem. Use the wrench flats on the stem to keep the stem from rotating.
PAGE 13
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). 9. Carefully remove the lower diaphragm head (key 53) from the actuator stem (key 40) so that the actuator stem threads do not damage the O-ring inside the lower diaphragm head. Replace the lower diaphragm head O-ring (key 51) if necessary. 10.
PAGE 14
Type MR108 Note For pressure-loaded actuator option skip steps 20 and 21 and proceed to step 22 with upper casing welding assembly (key 87). 20. 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).
PAGE 15
Type MR108 Note 10. If it is desired to replace the stem O-rings and bearings (keys 47 and 46, details X and Z), disconnect the control line tubing. 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.
PAGE 16
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 ft-lbs / 34 to 38 N•m.
PAGE 17
Type MR108 Key 1, Type MR108 Valve Bodies Material End Connection NPT Cast Iron WCC Steel CF8M Stainless steel (NACE) CF3M Stainless steel (NACE) WCC Steel (NACE) Key Body Size, NPS / DN 1 / 25 2 / 50 3 / 80 4 / 100 34B7611X012 38A8845X012 ----------- ----------- CL125 FF 34B8630X012 38A8847X012 38A8851X012 38A8865X012 CL250 RF 37B5950X012 38A8846X012 38A8850X012 38A8854X012 ----------- NPT 37B5946X012 38A8848X012 ----------- CL150 RF 37B5947X012 38A8853X012 38A8872X012 38A8
PAGE 18
Type MR108 Key Description 15* Upper Seal (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 16 Valve Plug For NPS 1 /
PAGE 19
Type MR108 71 L3 68 69 52 L1 SEE DETAIL V 76 64 26 66 L1 53 65 55 63 65 56 57 L1 58 84 S 62 L1 L1 SEE DETAIL X SEE DETAIL Z 51 74 L1 29 L1 S 61 9 L1 3 4 L1 L1 21 11 L1 L1 40 12 L1 16 13 L1 SEE DETAIL Y ge38436 S L1 17 39 S SEE DETAIL W NOTE: KEYS 64 AND 71 ARE USED ONLY FOR PRESSURE-LOADED ACTUATORS.
PAGE 20
Type MR108 Key Description 48* Jam Nut (NACE) (2 required) Zinc-plated steel 49* Belleville Spring Washer (NACE) 51* Lower Diaphragm Head O-ring (NACE) Nitrile (NBR) Fluorocarbon (FKM) Ethylene Propylene (EPDM) 52 Lower Spring Guide (NACE)(1) Zinc-plated steel 53 Lower Diaphragm Head (NACE) S17400 Stainless steel For Low-Pressure Actuator For High-Pressure Actuator 54 Lower Spring Seat (NACE)(1) Zinc-plated steel 55 Diaphragm Plate (NACE)(1) Cast Iron 56* Diaphragm (NACE)
PAGE 21
Type MR108 73 L3 72 70 43 44 L2 30 S 26 74 L1 2 1 25 38 L1 24 S 67 L1 57 L1 ge38436 APPLY lubricant or sealant(1): L1 = Multi-Purpose PTFE Lubricant L2 = multi-purpose nlgi(2) 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.
PAGE 22
Type MR108 71 54 L1 64 67 L1 63 51 53 58 L1 56 L1 57 L1 62 S high-pressure actuator option 43 24 ge38436 NOTE: KEYS 64 AND 71 ARE USED ONLY FOR PRESSURE-LOADED ACTUATORS. APPLY lubricant or sealant(1): 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.
PAGE 23
Type MR108 48 41 49 detail v detail w 46 60 47 detail x L1 15 16 2 L1 20 L1 47 L1 46 L1 45 14 ge38436 detail y detail z APPLY lubricant(1): L1 = Multi-Purpose PTFE Lubricant 1. Lubricants must be selected such that they meet the temperature requirements. Figure 4.
PAGE 24
Type MR108 Industrial Regulators Natural Gas Technologies TESCOM Emerson Process Management Regulator Technologies, Inc. Emerson Process Management Regulator Technologies, Inc. Emerson Process Management Tescom Corporation USA - Headquarters McKinney, Texas 75070 USA Tel: +1 800 558 5853 Outside U.S. +1 972 548 3574 USA - Headquarters McKinney, Texas 75070 USA Tel: +1 800 558 5853 Outside U.S.