About Backflow-Prevention Valves
More
Threaded Check Valves for Vacuum
- For Use With: Air
- Ball Material: Acetal Plastic
- Spring Material: Stainless Steel
- Seal Material: Buna-N Rubber
Prevent vacuum loss with these airtight, leakproof valves. They open to allow flow in one direction and close when flow stops or reverses.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
For technical drawings and 3-D models, click on a part number.
| Pipe Size  | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Vacuum Rating, in. of Hg | Each | |
Anodized Aluminum Body | ||||||||
|---|---|---|---|---|---|---|---|---|
NPT Female × NPT Female | ||||||||
| 1/4 | 1.15 | 230 psi @ 200° F | 0.28 | 0° to 200° | 1 3/8" | 0.58 | 000000 | 000000 |
| 3/8 | 4.7 | 230 psi @ 200° F | 0.3 | 0° to 200° | 2 1/8" | 0.6 | 000000 | 00000 |
| 1/2 | 4.7 | 230 psi @ 200° F | 0.3 | 0° to 200° | 2 1/8" | 0.6 | 000000 | 00000 |
| 1 1/4 | 28 | 230 psi @ 200° F | 0.07 | 0° to 200° | 3 3/8" | 0.14 | 000000 | 00000 |
| 2 | 63 | 230 psi @ 200° F | 0.17 | 0° to 200° | 5" | 0.35 | 000000 | 000000 |
Pipeline Flame Arresters
- For Use With: Butane, Natural Gas, Propane
- Flame-Arresting Element Material: 316 Stainless Steel
To prevent flashback in flammable gas pipelines, an internal flame-arresting element absorbs the heat from a fire to extinguish the flame. These valves are commonly used in pilot lines connected to waste gas burners.
For technical drawings and 3-D models, click on a part number.
| Pipe Size | Max. Pressure | Max. Temperature, °F | End-to-End Lg. | Each | |
Aluminum Body | |||||
|---|---|---|---|---|---|
NPT Female | |||||
| 1/4 | 25 psi @ 176° F | 176° | 3" | 0000000 | 0000000 |
| 1/2 | 25 psi @ 176° F | 176° | 3 3/4" | 0000000 | 000000 |
| 3/4 | 25 psi @ 176° F | 176° | 3 3/4" | 0000000 | 000000 |
| 1 | 25 psi @ 176° F | 176° | 3 3/4" | 0000000 | 000000 |
| 1 1/2 | 25 psi @ 176° F | 176° | 3 3/4" | 0000000 | 000000 |
| 2 | 25 psi @ 176° F | 176° | 4 3/4" | 0000000 | 000000 |
Backflow-Prevention Screw-In Hydraulic Valves
These valves open to allow flow in one direction and close when flow stops or reverses. Also known as check valves and cartridge valves, they screw into your mounting block.
For technical drawings and 3-D models, click on a part number.
Body—UN/UNF (SAE Straight) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deltrol Equivalent Model No. | Hydraforce Equivalent Model No. | Parker Equivalent Model No. | Thread Size | Dash Size | Max. Flow Rate, gpm | Flow Coefficient (Cv) | Max. Pressure, psi | Min. Opening Pressure, psi | O'all Ht. | Mounting Orientation | Each | |
Ball Check Valve | ||||||||||||
Black Anodized Aluminum Body | ||||||||||||
| DCV-080-B-N-2 | __ | __ | 3/4"-16 | 08 | 5 | Not Rated | 3,000 | 2 | 1 1/4" | Any Position | 0000000 | 000000 |
| DCV-080-B-N-5 | __ | __ | 3/4"-16 | 08 | 5 | Not Rated | 3,000 | 5 | 1 1/4" | Any Position | 0000000 | 00000 |
| DCV-080-B-N-10 | CV08-20-0-N-10 | __ | 3/4"-16 | 08 | 5 | Not Rated | 3,000 | 10 | 1 1/4" | Any Position | 0000000 | 00000 |
| DCV-080-B-N-25 | CV08-20-0-N-25 | __ | 3/4"-16 | 08 | 5 | Not Rated | 3,000 | 25 | 1 1/4" | Any Position | 0000000 | 00000 |
| DCV-100-B-N-5 | CV10-20-0-N-05 | __ | 7/8"-14 | 10 | 20 | Not Rated | 3,000 | 5 | 1 5/8" | Any Position | 0000000 | 00000 |
| DCV-100-B-N-15 | CV10-20-0-N-15 | D04B2-1.0-N | 7/8"-14 | 10 | 20 | Not Rated | 3,000 | 15 | 1 5/8" | Any Position | 0000000 | 00000 |
| DCV-100-B-N-30 | CV10-20-0-N-30 | __ | 7/8"-14 | 10 | 20 | Not Rated | 3,000 | 30 | 1 5/8" | Any Position | 0000000 | 00000 |
| DCV-100-B-N-60 | __ | D04B2-2.1-N | 7/8"-14 | 10 | 20 | Not Rated | 3,000 | 60 | 1 5/8" | Any Position | 0000000 | 00000 |