Proportional Relief Valves - Low Pressure
Proportional Relief Valves
Low Pressure Proportional Relief Valves
RL Series proportional relief valves protect pressure sensitive equipment in systems with working pressures up to 300 psig (20.6 bar) and set pressures from 10 to 225 psig (0.7 to 15.5 bar).
Set Pressures:
- Temperature Range: -40 to 300°F (-40 to 300°C)
- MAWP: 300 psig (20.6 bar)
- Set Pressure Range: 10 to 225 psig (0.7 to 15.5 bar) One spring for the full set pressure range. RL Series valves are shipped with springs installed.
End Connections:
- RL3: 1/4 in., 6 mm and 8 mm tube ends, 1/4 in. NPT and BSPT pipe ends
- RL4: 1/2 in. and 12 mm tube ends 1/2 in. NPT and BSPT pipe ends
Options
- Factory set valves
- Manual override handle
- Seal Materials
- Fluorocarbon FKM (Standard)
- Nitrile
- Ethylene Propylene
Part # |
CAD |
Body Material |
Connection 1 - Type |
Connection 1 - Size |
Connection 2 - Type |
Connection 2 - Size |
Seal Material |
Set Pressure Range |
Production Category |
Handle Type |
Handle Color |
Product Descriptions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RL34MRT4FRT-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 | Seal Material N/A FKM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Female ISO/BSPT |
| RL34MRT4FRT-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 | Seal Material N/A Nitrile | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Female ISO/BSPT |
| RL34MRT4FRT-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 | Seal Material N/A EPDM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Female ISO/BSPT |
| RL34PM4PF-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 | Seal Material N/A FKM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Female NPT |
| RL34PM4PF-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 | Seal Material N/A Nitrile | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Female NPT |
| RL34PM4PF-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 | Seal Material N/A EPDM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Female NPT |
| RL34PMD4-316 |
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 | Seal Material N/A FKM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL34PMD4-316-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 | Seal Material N/A Nitrile | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL34PMD4-316-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 | Seal Material N/A EPDM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL3D4-316 |
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 | Seal Material N/A FKM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL3D4-316-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 | Seal Material N/A Nitrile | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL3D4-316-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 | Seal Material N/A EPDM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL3DM6-316 |
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 | Seal Material N/A FKM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL3DM6-316-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 | Seal Material N/A Nitrile | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL3DM6-316-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 | Seal Material N/A EPDM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL3DM8-316 |
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 | Seal Material N/A FKM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL3DM8-316-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 | Seal Material N/A Nitrile | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL3DM8-316-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 | Seal Material N/A EPDM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL48PM8PF-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 | Seal Material N/A FKM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Female NPT |
| RL48PM8PF-316-BN |
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 | Seal Material N/A Nitrile | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Female NPT |
| RL48PM8PF-316-EP |
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 | Seal Material N/A EPDM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Female NPT |
| RL48PMD8-316 |
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 Duolok Tube Fitting | Connection 2 - Size N/A 1/2 in | Seal Material N/A FKM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL48PMD8-316-BN |
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 Duolok Tube Fitting | Connection 2 - Size N/A 1/2 in | Seal Material N/A Nitrile | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL48PMD8-316-EP |
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 Duolok Tube Fitting | Connection 2 - Size N/A 1/2 in | Seal Material N/A EPDM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Male NPT to Fractional Tube Fitting |
| RL4D8-316 |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Duolok Tube Fitting | Connection 1 - Size N/A 1/2 in | Connection 2 - Type N/A Duolok Tube Fitting | Connection 2 - Size N/A 1/2 in | Seal Material N/A FKM | Set Pressure Range N/A 10 to 225 psig0.7 to15.5 bar | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 | Product Descriptions N/A Fractional Tube Fitting |
