SSP Corporation
SSP Corporation
8250 Boyle Parkway
Twinsburg, OH 44087-2200
U.S.A.
Phone: 330-425-4250
Email: customer.inquiries@myssp.com
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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)
RHQRG
Unit of Measure
1 2 

Part #

CAD

Body Material

Connection 1 - Type

Connection 1 - Size

Connection 2 - Type

Connection 2 - Size

Orifice

O-ring Material

Set Pressure Range

Product Descriptions

End Connection Type

RH34MRT4FRT-316 N/A CAD Icon (for items table) N/A 316 SS N/A Male BSPT N/A 1/4-19 N/A Female BSPT N/A 1/4-19 N/A 0.14 in3.6 mm N/A FKM N/A 50 to 6000 psig3.4 to 413 bar N/A Male to Female ISO Tapered Proportional Relief Valve N/A Male British Standard Pipe Tapered by Female British Standard Pipe Tapered
RH34MRT4FRT-316-BN N/A CAD Icon (for items table) N/A 316 SS N/A Male BSPT N/A 1/4-19 N/A Female BSPT N/A 1/4-19 N/A 0.14 in3.6 mm N/A Nitrile Buna Rubber N/A 50 to 6000 psig3.4 to 413 bar N/A Male to Female ISO Tapered Proportional Relief Valve N/A Male British Standard Pipe Tapered by Female British Standard Pipe Tapered
RH34MRT4FRT-316-EP N/A CAD Icon (for items table) N/A 316 SS N/A Male BSPT N/A 1/4-19 N/A Female BSPT N/A 1/4-19 N/A 0.14 in3.6 mm N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar N/A Male to Female ISO Tapered Proportional Relief Valve N/A Male British Standard Pipe Tapered by Female British Standard Pipe Tapered
RH34MRT4FRT-316-FFKM N/A CAD Icon (for items table) N/A 316 SS N/A Male BSPT N/A 1/4-19 N/A Female BSPT N/A 1/4-19 N/A 0.14 in3.6 mm N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar N/A Male to Female ISO Tapered Proportional Relief Valve N/A Male British Standard Pipe Tapered by Female British Standard Pipe Tapered
RH34PM4PF-316 N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4-18 N/A FNPT N/A 1/4-18 N/A 0.14 in3.6 mm N/A FKM N/A 50 to 6000 psig3.4 to 413 bar N/A Male to Female NPT Proportional Relief Valve N/A Male National Pipe Thread by Female National Pipe Thread
RH34PM4PF-316-BN N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4-18 N/A FNPT N/A 1/4-18 N/A 0.14 in3.6 mm N/A Nitrile Buna Rubber N/A 50 to 6000 psig3.4 to 413 bar N/A Male to Female NPT Proportional Relief Valve N/A Male National Pipe Thread by Female National Pipe Thread
RH34PM4PF-316-EP N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4-18 N/A FNPT N/A 1/4-18 N/A 0.14 in3.6 mm N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar N/A Male to Female NPT Proportional Relief Valve N/A Male National Pipe Thread by Female National Pipe Thread
RH34PM4PF-316-FFKM N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4-18 N/A FNPT N/A 1/4-18 N/A 0.14 in3.6 mm N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar N/A Male to Female NPT Proportional Relief Valve N/A Male National Pipe Thread by Female National Pipe Thread
RH34PMD4-316 N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4-18 N/A Duolok Tube Fitting N/A 1/4 in N/A 0.14 in3.6 mm N/A FKM N/A 50 to 6000 psig3.4 to 413 bar N/A Male NPT to Duolok Tube Fitting Proportional Relief Valve N/A Male National Pipe Thread by Duolok Tube End
RH34PMD4-316-BN N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4-18 N/A Duolok Tube Fitting N/A 1/4 in N/A 0.14 in3.6 mm N/A Nitrile Buna Rubber N/A 50 to 6000 psig3.4 to 413 bar N/A Male NPT to Duolok Tube Fitting Proportional Relief Valve N/A Male National Pipe Thread by Duolok Tube End
RH34PMD4-316-EP N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4-18 N/A Duolok Tube Fitting N/A 1/4 in N/A 0.14 in3.6 mm N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar N/A Male NPT to Duolok Tube Fitting Proportional Relief Valve N/A Male National Pipe Thread by Duolok Tube End
RH34PMD4-316-FFKM N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/4-18 N/A Duolok Tube Fitting N/A 1/4 in N/A 0.14 in3.6 mm N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar N/A Male NPT to Duolok Tube Fitting Proportional Relief Valve N/A Male National Pipe Thread by Duolok Tube End
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 0.14 in3.6 mm N/A FKM N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
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 in3.6 mm N/A Nitrile Buna Rubber N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
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 in3.6 mm N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
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 in3.6 mm N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
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 0.14 in3.6 mm N/A FKM N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
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 in3.6 mm N/A Nitrile Buna Rubber N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
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 in3.6 mm N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
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 in3.6 mm N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
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 0.14 in3.6 mm N/A FKM N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
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 in3.6 mm N/A Nitrile Buna Rubber N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
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 in3.6 mm N/A EPDM N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
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 in3.6 mm N/A FFKM N/A 50 to 6000 psig3.4 to 413 bar N/A Duolok Tube End Proportional Relief Valve N/A Duolok Tube End
RH48PM8PF-316 N/A CAD Icon (for items table) N/A 316 SS N/A MNPT N/A 1/2-14 N/A FNPT N/A 1/2-14 N/A 0.25 in6.4 mm N/A FKM N/A 50 to 1500 psig3.4 to 103 bar N/A Male to Female NPT Proportional Relief Valve N/A Male National Pipe Thread by Female National Pipe Thread
Unit of Measure
1 2