About Backflow-Prevention Valves
More
Compact Threaded Check Valves
- For Use With: Air, Nitrogen, Water
- Ball Material: 304 Stainless Steel
- Seal Material: See table
With a shorter end-to-end length than other check valves, these fit in tight spaces. They open to allow flow in one direction and close when flow stops or reverses.
303 stainless steel valves are more corrosion resistant than brass valves.
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. | Each | |
Brass Body | |||||||
---|---|---|---|---|---|---|---|
304 Stainless Steel Seal | |||||||
1/8 | 0.081 | 200 psi @ 70° F | 2 | 35° to 300° | 1" | 0000000 | 000000 |
1/4 | 0.19 | 200 psi @ 70° F | 2 | 35° to 300° | 1 3/8" | 0000000 | 00000 |
304 Stainless Steel Seal with Loctite® Internal Sealant | |||||||
1/8 | 0.081 | 2,000 psi @ 70° F | 2 | 35° to 300° | 1" | 00000000 | 00000 |
1/4 | 0.19 | 2,000 psi @ 70° F | 2 | 35° to 300° | 1 3/8" | 00000000 | 00000 |
303 Stainless Steel Body | |||||||
304 Stainless Steel Seal | |||||||
1/8 | 0.081 | 200 psi @ 70° F | 2 | 35° to 300° | 1" | 0000000 | 00000 |
1/4 | 0.19 | 200 psi @ 70° F | 2 | 35° to 300° | 1 3/8" | 0000000 | 00000 |
304 Stainless Steel Seal with Loctite® Internal Sealant | |||||||
1/8 | 0.081 | 2,000 psi @ 70° F | 2 | 35° to 300° | 1" | 00000000 | 00000 |
1/4 | 0.19 | 2,000 psi @ 70° F | 2 | 35° to 300° | 1 3/8" | 00000000 | 00000 |

Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Each | |
Brass Body | |||||||
---|---|---|---|---|---|---|---|
304 Stainless Steel Seal | |||||||
1/8 | 0.081 | 200 psi @ 70° F | 2 | 35° to 300° | 7/8" | 00000000 | 000000 |
1/4 | 0.19 | 200 psi @ 70° F | 2 | 35° to 300° | 1 1/4" | 00000000 | 00000 |
303 Stainless Steel Body | |||||||
304 Stainless Steel Seal | |||||||
1/8 | 0.081 | 200 psi @ 70° F | 2 | 35° to 300° | 7/8" | 00000000 | 00000 |
1/4 | 0.19 | 200 psi @ 70° F | 2 | 35° to 300° | 1 1/4" | 00000000 | 00000 |

Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Each | |
Brass Body | |||||||
---|---|---|---|---|---|---|---|
304 Stainless Steel Seal | |||||||
1/8 | 0.081 | 200 psi @ 70° F | 2 | 35° to 300° | 7/8" | 00000000 | 000000 |
1/4 | 0.19 | 200 psi @ 70° F | 2 | 35° to 300° | 1 1/4" | 00000000 | 00000 |
303 Stainless Steel Body | |||||||
304 Stainless Steel Seal | |||||||
1/8 | 0.081 | 200 psi @ 70° F | 2 | 35° to 300° | 7/8" | 00000000 | 00000 |
1/4 | 0.19 | 200 psi @ 70° F | 2 | 35° to 300° | 1 1/4" | 00000000 | 00000 |

Thread Size | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Each | |
Brass Body | |||||||
---|---|---|---|---|---|---|---|
304 Stainless Steel Seal | |||||||
10-32 | 0.081 | 125 psi @ 70° F | 2 | 35° to 150° | 13/16" | 0000000 | 000000 |
303 Stainless Steel Body | |||||||
304 Stainless Steel Seal | |||||||
10-32 | 0.081 | 125 psi @ 70° F | 2 | 35° to 150° | 13/16" | 0000000 | 00000 |
Backflow-Prevention Inline Hydraulic Valves
Also known as check valves, these open to allow flow in one direction and close when flow stops or reverses.
Brass valves have good corrosion resistance. 303 stainless steel valves are more corrosion resistant than brass valves.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.

Inlet Connection | Outlet Connection | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Dash Size | Pipe Size | Dash Size | Max. Flow Rate, gpm | Flow Coefficient (Cv) | Max. Pressure, psi | Min. Opening Pressure, psi | Seal Material | Port-to-Port Lg. | Hex Wd. | Mounting Orientation | Temp. Range, °F | Each | |
Brass Body | ||||||||||||||
1/8 | 02 | 1/8 | 02 | 1 | 0.17 | 2,000 | 2.5 | __ | 1" | 7/16" | Any Position | -30° to 190° | 00000000 | 000000 |
1/8 | 02 | 1/8 | 02 | 1 | 0.17 | 2,000 | 2.5 | Buna-N Rubber | 1" | 7/16" | Any Position | -30° to 190° | 00000000 | 00000 |
1/4 | 04 | 1/4 | 04 | 2.5 | 0.56 | 2,000 | 2.5 | __ | 1 3/8" | 5/8" | Any Position | -30° to 190° | 00000000 | 00000 |
1/4 | 04 | 1/4 | 04 | 2.5 | 0.56 | 2,000 | 2.5 | Buna-N Rubber | 1 3/8" | 5/8" | Any Position | -30° to 190° | 00000000 | 00000 |
3/8 | 06 | 3/8 | 06 | 6 | 1.31 | 2,000 | 2.5 | __ | 1 5/8" | 3/4" | Any Position | -30° to 190° | 00000000 | 00000 |
3/8 | 06 | 3/8 | 06 | 6 | 1.31 | 2,000 | 2.5 | Buna-N Rubber | 1 5/8" | 3/4" | Any Position | -30° to 190° | 00000000 | 00000 |
1/2 | 08 | 1/2 | 08 | 10 | 2.71 | 2,000 | 2.5 | __ | 2 1/8" | 7/8" | Any Position | -30° to 190° | 00000000 | 00000 |
1/2 | 08 | 1/2 | 08 | 10 | 2.71 | 2,000 | 2.5 | Buna-N Rubber | 2 1/8" | 7/8" | Any Position | -30° to 190° | 00000000 | 00000 |
3/4 | 12 | 3/4 | 12 | 15 | 3.4 | 2,000 | 2.5 | Buna-N Rubber | 2 1/4" | 1 1/8" | Any Position | -30° to 190° | 00000000 | 000000 |
Steel Body | ||||||||||||||
1/4 | 04 | 1/4 | 04 | 2.5 | 0.56 | 3,000 | 2.5 | __ | 1 3/8" | 5/8" | Any Position | -30° to 190° | 00000000 | 00000 |
1/4 | 04 | 1/4 | 04 | 2.5 | 0.56 | 3,000 | 2.5 | Buna-N Rubber | 1 3/8" | 5/8" | Any Position | -30° to 190° | 00000000 | 00000 |
3/8 | 06 | 3/8 | 06 | 6 | 1.31 | 3,000 | 2.5 | __ | 1 5/8" | 3/4" | Any Position | -30° to 190° | 00000000 | 00000 |
3/8 | 06 | 3/8 | 06 | 6 | 1.31 | 3,000 | 2.5 | Buna-N Rubber | 1 5/8" | 3/4" | Any Position | -30° to 190° | 00000000 | 00000 |
1/2 | 08 | 1/2 | 08 | 10 | 2.71 | 3,000 | 2.5 | __ | 2 1/8" | 7/8" | Any Position | -30° to 190° | 00000000 | 00000 |
1/2 | 08 | 1/2 | 08 | 10 | 2.71 | 3,000 | 2.5 | Buna-N Rubber | 2 1/8" | 7/8" | Any Position | -30° to 190° | 00000000 | 00000 |
303 Stainless Steel Body | ||||||||||||||
1/4 | 04 | 1/4 | 04 | 2.5 | 0.56 | 3,000 | 2.5 | __ | 1 3/8" | 5/8" | Any Position | -30° to 190° | 00000000 | 00000 |
1/4 | 04 | 1/4 | 04 | 2.5 | 0.56 | 3,000 | 2.5 | Buna-N Rubber | 1 3/8" | 5/8" | Any Position | -30° to 190° | 00000000 | 00000 |
3/8 | 06 | 3/8 | 06 | 6 | 1.31 | 3,000 | 2.5 | Buna-N Rubber | 1 5/8" | 3/4" | Any Position | -30° to 190° | 00000000 | 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 |