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Emerson Fisher MR98 Series Manual
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Emerson Fisher MR98 Series Manual

Backpressure regulators and relief valves – ad2000 compliant
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Instruction Manual
MR98 Series AD2000 Compliant
D104615X012
  A pril 2022
MR98 Series Backpressure Regulators and
Relief Valves – AD2000 Compliant
P1757_1
TYPE MR98H WITH FLANGE END CONNECTION
P1753_1
TYPE MR98H
Figure 1. Typical MR98 Series Backpressure Regulators and Relief Valves

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Summary of Contents for Emerson Fisher MR98 Series

  • Page 1 Instruction Manual MR98 Series AD2000 Compliant D104615X012   A pril 2022 MR98 Series Backpressure Regulators and Relief Valves – AD2000 Compliant P1757_1 TYPE MR98H WITH FLANGE END CONNECTION P1753_1 TYPE MR98H Figure 1. Typical MR98 Series Backpressure Regulators and Relief Valves...
  • Page 2 MR98 Series AD2000 Compliant Specifications This section lists the specifications for the MR98 Series Regulators. Factory specification such as type, maximum inlet pressure, maximum temperature, maximum outlet pressure, spring range, orifice size and seat material are stamped on the nameplate fastened on the regulator at the factory. Available Constructions IEC Sizing Coefficients Type MR98H: Backpressure regulator/relief valve...
  • Page 3 MR98 Series AD2000 Compliant Table 1. Types MR98H and MR98HH Regulators Body Constructions BODY MATERIAL BODY SIZE BODY CONSTRUCTION END CONNECTION STYLE 1.4408 Stainless Steel G Thread Welded CL150 RF Welded CL300 RF Without Control Line and Gauge Port Welded PN 16/25/40 RF 1/2 in.
  • Page 4 MR98 Series AD2000 Compliant Table 1. Types MR98H and MR98HH Regulators Body Constructions (continued) BODY MATERIAL BODY SIZE BODY CONSTRUCTION END CONNECTION STYLE 1.4408 Stainless Steel G Thread Without control line and gauge port Welded CL150 RF Welded CL300 RF Welded PN 16/25/40 RF 1-1/2 in.
  • Page 5 MR98 Series AD2000 Compliant Table 2. MR98 Series Body Sizes, Pressure Ranges and Spring Information CONTROL SPRING WIRE SPRING FREE BODY SIZE SPRING PART PRESSURE RANGE DIAMETER LENGTH TYPE SPRING MATERIAL SPRING COLOR NUMBER psig 15 to 35 1.0 to 2.4 0.207 5.26 2.50...
  • Page 6 (see Figure 2) through a registration hole local codes, rules and regulations and in the valve body or through an external control line. Emerson instructions. When the pressure increases above the spring setting, the pressure underneath the diaphragm overcomes the If a leak develops or if the outlet spring compression.
  • Page 7 MR98 Series AD2000 Compliant ADJUSTING SCREW CONTROL SPRING VENT DIAPHRAGM VALVE PLUG ORIFICE CONTROL LINE TAP M1239_12/2019 M1240_12/2019 TYPE MR98H WITH INTERNAL 1/2 in. / DN 15 TYPE MR98H SIDE AND INTERNAL VIEW OF PRESSURE REGISTRATION WITH EXTERNAL 3/4 TO 2 in./ DN 20 TO 50 PRESSURE REGISTRATION TYPE MR98H WITH EXTERNAL PRESSURE REGISTRATION...
  • Page 8 MR98 Series AD2000 Compliant Before installing the regulator: To prevent such injury or damage, provide piping or tubing to vent the • Unpack the backpressure regulator or relief valve gas to a safe, well-ventilated area. All and remove the protective shipping plugs from vents should be kept open to permit free the end connections of the body and the pressure flow of gas to the atmosphere.
  • Page 9 2. Close the downstream shutoff valve to the being returned to service. Only parts regulator outlet. manufactured by Emerson should be 3. Slowly open the downstream vent valve to vent used for repairing Fisher™ relief valves downstream pressure.
  • Page 10 MR98 Series AD2000 Compliant Table 5. Torque Specifications BODY SIZE SPRING CASE BOLTS ORIFICE VALVE PLUG GUIDE BOTTOM PLUG Ft-lbs N•m Ft-lbs N•m Ft-lbs N•m Ft-lbs N•m 10 to 13 13 to 18 34 to 38 46 to 51 70 to 90 94 to 122 75 to 90 102 to 122...
  • Page 11 MR98 Series AD2000 Compliant Table 6. Number of Diaphragms Required BODY SIZE TYPE SPRING RANGE DIAPHRAGM MATERIAL NUMBER OF DIAPHRAGM Neoprene (CR) Fluorocarbon (FKM) NPS 1/2 to 2 / DN 15 to 50 Ethylenepropylene (EPDM) Metal Note 11. Set the relief valve spring (key 11) in the lower spring seat and place the upper spring seat If a metal diaphragm is to be replaced by (key 9) on the spring.
  • Page 12 MR98 Series AD2000 Compliant Parts Ordering Description Part Number Bottom Plug When corresponding with your local Sales Office about 1/2 in. / DN 15 Body Size this equipment, always reference the equipment serial 1.4401/1.4404 Stainless steel, NACE GF05532X222 number stamped on the nameplate. 3/4 and 1 in.
  • Page 13 MR98 Series AD2000 Compliant Description Part Number Description Part Number Nameplate - - - - - - - - - - - Machine Screw (continued) 1-1/2 and 2 in. / DN 40 and 50 Body Sizes Diaphragm Protector, PTFE, NACE 416 Stainless steel 1P788638992 Types MR98H and MR98HH...
  • Page 14 MR98 Series AD2000 Compliant Description Part Number Description Part Number Vent L-ring Type MR98HH 1-1/2 and 2 in. / DN 40 and 50 Body Sizes 1/2 to 1 in. / DN 15 to 25 Body Sizes ERAA02123A0 Nitrile (NBR) seat ERCA00668A1 Type MR98H Fluorocarbon (FKM) seat...
  • Page 15 MR98 Series AD2000 Compliant Key 1, Types MR98H and MR98HH Body Part Numbers BODY MATERIAL BODY SIZE BODY CONSTRUCTION END CONNECTION STYLE 1.4408 Stainless steel G Thread ERAA51929A0 Without control line 1/2 in. / DN 15 Integral PN 16/25/40 RF ERAA51928A0 With control line G Thread...
  • Page 16 MR98 Series AD2000 Compliant Key 4*, Valve Plug, Composition Seat BODY SIZE VALVE PLUG MATERIAL BODY STYLE 416 Stainless Steel 316 Stainless Steel Hastelloy (1)(2) ® Without control line ERCA01338A0 ERCA01338A1 - - - - - - - - - - - With control line ERCA01333A0 ERCA01333A1...
  • Page 17 MR98 Series AD2000 Compliant SEALED ADJUSTING SCREW OPTION CONTROL LINE OPTION COMPOSITE SEAT OPTION METAL DIAPHRAGM OPTION NAMEPLATE AND FLOW ARROW GF04916 APPLY T = THREAD LOCKER L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE FOR O-RINGS L2 = ANTI - SEIZE COMPOUND L4 = GRAPHITE SEALANT FOR GRAPHITE RING 1.
  • Page 18 MR98 Series AD2000 Compliant SEALED ADJUSTING SCREW OPTION CONTROL LINE OPTION COMPOSITE SEAT OPTION METAL DIAPHRAGM OPTION NAMEPLATE AND FLOW ARROW ERAA03248 APPLY T = THREAD LOCKER L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE FOR O-RINGS L2 = ANTI - SEIZE COMPOUND L4 = GRAPHITE SEALANT FOR GRAPHITE RING 1.
  • Page 19 MR98 Series AD2000 Compliant NAMEPLATE AND FLOW ARROW SEE NOTE 4 METAL DIAPHRAGM OPTION COMPOSITE SEAT OPTION CONTROL LINE OPTION ERCA00605 APPLY T = THREAD LOCKER L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE FOR O-RINGS L2 = ANTI - SEIZE COMPOUND L4 = GRAPHITE SEALANT FOR GRAPHITE RING 1.
  • Page 20 Technologies, Inc. All rights reserved. 04/22. Emerson Automation Solutions 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...

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