Proportional Relief Valves - High Pressure
Proportional Relief Valves
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)
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| RH34MRT4FRT-316 |
CAD
N/A 
|
Body Material N/A 316 SS | Connection 1 - Type N/A Male BSPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Female BSPT | Connection 2 - Size N/A 1/4 in | Orifice N/A | O-ring Material N/A FKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Female ISO/BSPT |
| RH34MRT4FRT-316-BN |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Male BSPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Female BSPT | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A Nitrile | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Female ISO/BSPT |
| RH34MRT4FRT-316-EP |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Male BSPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Female BSPT | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A EPDM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Female ISO/BSPT |
| RH34MRT4FRT-316-FFKM |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Male BSPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Female BSPT | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A FFKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Female ISO/BSPT |
| RH34PM4PF-316 |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/4 in | Orifice N/A | O-ring Material N/A FKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Male NPT to Female NPT |
| RH34PM4PF-316-BN |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A Nitrile | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Male NPT to Female NPT |
| RH34PM4PF-316-EP |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A EPDM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Male NPT to Female NPT |
| RH34PM4PF-316-FFKM |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A FFKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Male NPT to Female NPT |
| RH34PMD4-316 |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 1/4 in | Orifice N/A | O-ring Material N/A FKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RH34PMD4-316-BN |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A Nitrile | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RH34PMD4-316-EP |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A EPDM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RH34PMD4-316-FFKM |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A FFKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RH3D4-316 |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 1/4 in | Orifice N/A | O-ring Material N/A FKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH3D4-316-BN |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A Nitrile | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH3D4-316-EP |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A EPDM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH3D4-316-FFKM |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 1/4 in | Orifice N/A 0.14 in | O-ring Material N/A FFKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH3DM6-316 |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 6 mm | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 6 mm | Orifice N/A | O-ring Material N/A FKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH3DM6-316-BN |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 6 mm | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 6 mm | Orifice N/A 0.14 in | O-ring Material N/A Nitrile | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH3DM6-316-EP |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 6 mm | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 6 mm | Orifice N/A 0.14 in | O-ring Material N/A EPDM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH3DM6-316-FFKM |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 6 mm | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 6 mm | Orifice N/A 0.14 in | O-ring Material N/A FFKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH3DM8-316 |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 8 mm | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 8 mm | Orifice N/A | O-ring Material N/A FKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH3DM8-316-BN |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 8 mm | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 8 mm | Orifice N/A 0.14 in | O-ring Material N/A Nitrile | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH3DM8-316-EP |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 8 mm | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 8 mm | Orifice N/A 0.14 in | O-ring Material N/A EPDM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH3DM8-316-FFKM |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 8 mm | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 8 mm | Orifice N/A 0.14 in | O-ring Material N/A FFKM | Set Pressure Range N/A 50 to 6000 psig3.4 to 413 bar | Product Descriptions N/A Fractional Tube Fitting |
| RH48PM8PF-316 |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 1/2 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/2 in | Orifice N/A | O-ring Material N/A FKM | Set Pressure Range N/A 50 to 1500 psig3.4 to 103 bar | Product Descriptions N/A Male NPT to Female NPT |
