High Pressure Proportional Relief Valves

RH Series proportional relief valves protect pressure sensitive equipment in systems with working pressures up to 6000 psig (413 bar) and set pressures from 50 to 6000 psig (3.4 to 413 bar). Standard RH Series proportional relief valves are shipped without springs. To order spring kits, see the Spring Kit catalog category.

  • Maximum Working Pressure: 6000 psig (413 bar)
  • Set Pressure: 50 to 6000 psig (3.4 to 413 bar) Multiple springs for a selection of set pressure ranges improve accuracy and reduce hysteresis
  • Temperature Range: -10 to 275°F (-23 to 135°C)
  • End Connections:
    • RH3: 1/4 in., 6 mm and 12 mm tube ends 1/4 in. NPT and BSPT pipe ends
    • RH4: 1/2 in. and 12 mm tube ends 1/2 in. NPT and BSPT pipe endsOptions:
  • Choice of Duolok, Griplok and Unilok tube end connections 316 SS valve bodies
  • Factory set valves R Series valves are available with springs factory-set to a specified set pressure. Valves are set, tested, locked, and tagged with the set pressure. Certificates of testing are included.
  • Manual override handle
  • Seal Materials
    • Fluorocarbon FKM (Standard)
    • Nitrile
    • Ethylene Propylene
    • Perfluoroelastomer FFKM (RH3 valves only)
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Part #

CAD

Body Material

Connection 1 - Type

Connection 1 - Size

Connection 2 - Type

Connection 2 - Size

Orifice

O-ring Material

Set Pressure Range

Quantity
RH34MRT4FRT-316 N/A CAD Icon (for items table) N/A 316 SS N/A Male BSPT N/A 1/4 in N/A Female BSPT N/A 1/4 in N/A N/A FKM N/A 50 to 6000 psig3.4 to 413 bar
RH34MRT4FRT-316-BN N/A CAD Icon (for items table) N/A 316 SS N/A Male BSPT N/A 1/4 in N/A Female BSPT N/A 1/4 in N/A 0.14 in N/A Nitrile N/A 50 to 6000 psig3.4 to 413 bar
RH34MRT4FRT-316-EP N/A CAD Icon (for items table) N/A 316 SS N/A Male BSPT N/A 1/4 in N/A Female BSPT N/A 1/4 in N/A 0.14 in N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar
RH34MRT4FRT-316-FFKM N/A CAD Icon (for items table) N/A 316 SS N/A Male BSPT N/A 1/4 in N/A Female BSPT N/A 1/4 in N/A 0.14 in N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar
RH34PM4PF-316 N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4 in N/A FNPT N/A 1/4 in N/A N/A FKM N/A 50 to 6000 psig3.4 to 413 bar
RH34PM4PF-316-BN N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4 in N/A FNPT N/A 1/4 in N/A 0.14 in N/A Nitrile N/A 50 to 6000 psig3.4 to 413 bar
RH34PM4PF-316-EP N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4 in N/A FNPT N/A 1/4 in N/A 0.14 in N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar
RH34PM4PF-316-FFKM N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4 in N/A FNPT N/A 1/4 in N/A 0.14 in N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar
RH34PMD4-316 N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4 in N/A Duolok Tube Fitting N/A 1/4 in N/A N/A FKM N/A 50 to 6000 psig3.4 to 413 bar
RH34PMD4-316-BN N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4 in N/A Duolok Tube Fitting N/A 1/4 in N/A 0.14 in N/A Nitrile N/A 50 to 6000 psig3.4 to 413 bar
RH34PMD4-316-EP N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4 in N/A Duolok Tube Fitting N/A 1/4 in N/A 0.14 in N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar
RH34PMD4-316-FFKM N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4 in N/A Duolok Tube Fitting N/A 1/4 in N/A 0.14 in N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar
RH3D4-316 N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 1/4 in N/A Duolok Tube Fitting N/A 1/4 in N/A N/A FKM N/A 50 to 6000 psig3.4 to 413 bar
RH3D4-316-BN N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 1/4 in N/A Duolok Tube Fitting N/A 1/4 in N/A 0.14 in N/A Nitrile N/A 50 to 6000 psig3.4 to 413 bar
RH3D4-316-EP N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 1/4 in N/A Duolok Tube Fitting N/A 1/4 in N/A 0.14 in N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar
RH3D4-316-FFKM N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 1/4 in N/A Duolok Tube Fitting N/A 1/4 in N/A 0.14 in N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar
RH3DM6-316 N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 6 mm N/A Duolok Tube Fitting N/A 6 mm N/A N/A FKM N/A 50 to 6000 psig3.4 to 413 bar
RH3DM6-316-BN N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 6 mm N/A Duolok Tube Fitting N/A 6 mm N/A 0.14 in N/A Nitrile N/A 50 to 6000 psig3.4 to 413 bar
RH3DM6-316-EP N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 6 mm N/A Duolok Tube Fitting N/A 6 mm N/A 0.14 in N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar
RH3DM6-316-FFKM N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 6 mm N/A Duolok Tube Fitting N/A 6 mm N/A 0.14 in N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar
RH3DM8-316 N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 8 mm N/A Duolok Tube Fitting N/A 8 mm N/A N/A FKM N/A 50 to 6000 psig3.4 to 413 bar
RH3DM8-316-BN N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 8 mm N/A Duolok Tube Fitting N/A 8 mm N/A 0.14 in N/A Nitrile N/A 50 to 6000 psig3.4 to 413 bar
RH3DM8-316-EP N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 8 mm N/A Duolok Tube Fitting N/A 8 mm N/A 0.14 in N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar
RH3DM8-316-FFKM N/A CAD Icon (for items table) N/A 316 SS N/A Duolok Tube Fitting N/A 8 mm N/A Duolok Tube Fitting N/A 8 mm N/A 0.14 in N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar
RH48PM8PF-316 N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/2 in N/A FNPT N/A 1/2 in N/A N/A FKM N/A 50 to 1500 psig3.4 to 103 bar
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