High-Pressure Check Valves
Check Valves
CH Series check valves offer reliable cracking and resealing in CNG fueling stations, sampling systems, natural gas vehicles and other high-pressure, high-cycle and high-flow applications requiring reliable cracking and resealing in high-pressure and high-flow applications.
Specifications
Specifications
- MAWP: Up to 6000 psig (413 bar)
- Temperature Range: -40 to 400° F (-40 to 204° C)
- Flow Coefficient: up to 3.25
- Materials: 316 Stainless Steel, Other materials available
- Cracking Pressures: 1/3 to 100 psig (0.023 to 6.89 bar)
- Highly durable metal to metal seal
- End Connections: Tube fitting, MNPT, FNPT, Male and Female BSPT
- ECE R110 Approved
Options
Our website contains the most popular CH Series Check Valve configurations - more configurations are available. To specify other configurations, please contact SSP Customer Service. Special ordering instructions for the options below are included in the CH Series Catalog.
Cracking Pressures
(Non-standard items are in bold. Call for availability)
- 1/3
- 1
- 5
- 10
- 20
- 25
- 50
- 75
- 100
O-ring Materials
SSP offers the following O-ring materials.
- FKM (Standard)
- NBR
- NBR3 - Low-temperature Nitrile
- EP
- FFKM
Tube Fitting End Connections
SSP offer three tube fitting designs.
- Duolok 2-ferrule end connections (Standard).
- Unilok single-ferrule end connections
- Griplok dual ferrule end connections
Part # |
CAD |
Body Material |
Connection 1 - Type |
Connection 1 - Size |
Connection 2 - Type |
Connection 2 - Size |
Cv |
O-ring Material |
Cracking Pressure |
Production Category |
Handle Type |
Handle Color |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CH4-U4-25-316 CH4-U4-25-316/Asset/CH-Fractional-Tube-fitting.jpg |
CAD
N/A 
|
Body Material N/A 316 SS | Connection 1 - Type N/A Unilok Tube Fitting | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Unilok Tube Fitting | Connection 2 - Size N/A 1/4 in | Cv N/A 0.60 | O-ring Material N/A FKM | Cracking Pressure N/A 25 psig | Production Category N/A 2 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH4-U4-50-316 CH4-U4-50-316/Asset/CH-Fractional-Tube-fitting.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Unilok Tube Fitting | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Unilok Tube Fitting | Connection 2 - Size N/A 1/4 in | Cv N/A 0.60 | O-ring Material N/A FKM | Cracking Pressure N/A 50 psig | Production Category N/A 2 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH4-U4-5-316 CH4-U4-5-316/Asset/CH-Fractional-Tube-fitting.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A Unilok Tube Fitting | Connection 1 - Size N/A 1/4 in | Connection 2 - Type N/A Unilok Tube Fitting | Connection 2 - Size N/A 1/4 in | Cv N/A 0.60 | O-ring Material N/A FKM | Cracking Pressure N/A 5 psig | Production Category N/A 2 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PF-1/3-316 CH8-6PF-1/3-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 1/3 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PF-10-316 CH8-6PF-10-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 10 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PF-1-316 CH8-6PF-1-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 1 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PF-25-316 CH8-6PF-25-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 10 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PF-5-316 CH8-6PF-5-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 25 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PM-1/3-316 CH8-6PM-1/3-316/Asset/CH-Male.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A MNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 1/3 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PM-10-316 CH8-6PM-10-316/Asset/CH-Male.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A MNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 10 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PM-1-316 CH8-6PM-1-316/Asset/CH-Male.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A MNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 1 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PM-25-316 CH8-6PM-25-316/Asset/CH-Male.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A MNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 25 psig | Production Category N/A 3 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PM-50-316 CH8-6PM-50-316/Asset/CH-Male.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A MNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 50 psig | Production Category N/A 2 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PM-5-316 CH8-6PM-5-316/Asset/CH-Male.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A MNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 5 psig | Production Category N/A 3 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-6PM-5-316 CH8-6PM-5-316/Asset/CH-Male.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A MNPT | Connection 1 - Size N/A 3/8 in | Connection 2 - Type N/A MNPT | Connection 2 - Size N/A 3/8 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 5 psig | Production Category N/A 3 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-8PF-1/3-316 CH8-8PF-1/3-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 1/2 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/2 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 1/3 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-8PF-100-316 CH8-8PF-100-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 1/2 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/2 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 100 psig | Production Category N/A 4 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-8PF-10-316 CH8-8PF-10-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 1/2 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/2 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 10 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-8PF-1-316 CH8-8PF-1-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 1/2 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/2 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 1 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-8PF-25-316 CH8-8PF-25-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 1/2 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/2 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 25 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-8PF-50-316 CH8-8PF-50-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 1/2 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/2 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 50 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-8PF-5-316 CH8-8PF-5-316/Asset/CH-Female.jpg |
CAD
N/A
|
Body Material N/A 316 SS | Connection 1 - Type N/A FNPT | Connection 1 - Size N/A 1/2 in | Connection 2 - Type N/A FNPT | Connection 2 - Size N/A 1/2 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 5 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-8PM-1/3-316 CH8-8PM-1/3-316/Asset/CH-Male.jpg |
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 MNPT | Connection 2 - Size N/A 1/2 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 1/3 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-8PM-100-316 CH8-8PM-100-316/Asset/CH-Male.jpg |
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 MNPT | Connection 2 - Size N/A 1/2 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 100 psig | Production Category N/A 4 | Handle Type N/A 0 | Handle Color N/A 0 |
| CH8-8PM-10-316 CH8-8PM-10-316/Asset/CH-Male.jpg |
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 MNPT | Connection 2 - Size N/A 1/2 in | Cv N/A 2.15 | O-ring Material N/A FKM | Cracking Pressure N/A 10 psig | Production Category N/A 1 | Handle Type N/A 0 | Handle Color N/A 0 |
