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Fisher™ Type MR108 Backpressure Regulators
Type MR108 backpressure regulators are direct-operated, high-capacity, multi-purpose regulators.
They are designed to handle pressures up to 400 psig / 27.6 bar and temperatures up to 250°F / 121°C. They provide reliable and economical control for different flow media like liquid, air, and gas. Application includes lube oil systems and any application where speed of response is critical, minimum differential pressure is a concern, or fluid is not free of impurities.

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Fisher™ Type MR108 Backpressure Regulators


Pressure Registration
Temperature Capabilities
Nitrile (NBR):?-20 to 180°F / -29 to 82°C
Body Sizes
NPS 1 / 2 / 3 / 4
End Connections
NPT / CL125FF / CL150RF / CL250RF / CL300RF / CL600RF / PN 16/25/40
Maximum Inlet Pressure
400 psig / 27.6 bar
Maximum Outlet Pressure
400 psig / 27.6 bar
Spring Ranges
5 to 300 psig / 0.4 to 20.7 bar
Additional Technical Data
For additional technical information,?contact?your local?Sales Office?or refer to technical documentation.


  • Steel and Stainless Steel Constructions Meet API 614 Requirements
  • Available Constructions to Meet NACE MR0175-2003 and NACE MR0103 Requirements for Sour Gas Service Capability
  • P1 = P2 on High-Pressure Actuator
  • Drain Valve
  • Pressure-Loaded Actuator
  • Bleed valve (for High-Pressure Actuator only)
  • Travel Indicator