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 |
Compact Plastic Threaded Check Valves
- For Use With: Air, Water
- Piston Material: Nylon Plastic
- Spring Material: 316 Stainless Steel
- Seal Material: Buna-N Rubber
At 1 1/2" long or less, these valves fit in confined spaces. They open to allow flow in one direction and close when flow stops or reverses.
For technical drawings and 3-D models, click on a part number.
Pipe Size | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
Nylon Plastic Body | |||||||
---|---|---|---|---|---|---|---|
NPT Male × NPT Male | |||||||
3/8 × 3/8 | 125 psi @ 70° F | 1 | -20° to 250° | White | 1 1/4" | 0000000 | 000000 |
1/2 × 1/4 | 125 psi @ 70° F | 1 | -20° to 250° | White | 1 3/8" | 0000000 | 00000 |
1/2 × 1/2 | 125 psi @ 70° F | 1 | -20° to 250° | White | 1 1/2" | 0000000 | 00000 |
1/2 × 3/4 | 125 psi @ 70° F | 1 | -20° to 250° | White | 1 1/2" | 0000000 | 00000 |
3/4 × 1/2 | 125 psi @ 70° F | 1 | -20° to 250° | White | 1 1/2" | 0000000 | 00000 |
Compact Flange-Mount Check Valves
- For Use With: Air, Argon, Helium, Krypton, Neon, Water, Xenon
- Piston Material: 316 Stainless Steel
- Spring Material: 316 Stainless Steel
- Seal Material: Viton® Fluoroelastomer
Less than half the end-to-end length of standard flange-mount check valves, these can be installed between ANSI flanges in pipelines with limited clearance. ANSI flanges are sold separately. Valves open to allow flow in one direction and close when flow stops or reverses. All have a 316 stainless steel body for excellent corrosion resistance.
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. | For Flange Class | Each | |
316 Stainless Steel Body | ||||||||
---|---|---|---|---|---|---|---|---|
Flanged × Flanged | ||||||||
1/2 | 2.4 | 720 psi @ 100° F | 0.5 | -10° to 400° | 1/4" | 150, 300 | 0000000 | 0000000 |
3/4 | 4.4 | 720 psi @ 100° F | 0.5 | -10° to 400° | 1/4" | 150, 300 | 0000000 | 000000 |
1 | 6.1 | 720 psi @ 100° F | 0.5 | -10° to 400° | 1/4" | 150, 300 | 0000000 | 000000 |
1 1/4 | 12.7 | 720 psi @ 100° F | 0.5 | -10° to 400° | 1/4" | 150, 300 | 0000000 | 000000 |
1 1/2 | 18.8 | 720 psi @ 100° F | 0.5 | -10° to 400° | 1/4" | 150, 300 | 0000000 | 000000 |
2 | 32 | 720 psi @ 100° F | 0.5 | -10° to 400° | 1/4" | 150, 300 | 0000000 | 000000 |
3 | 89 | 720 psi @ 100° F | 0.5 | -10° to 400° | 5/16" | 150, 300 | 0000000 | 000000 |
4 | 144 | 720 psi @ 100° F | 0.5 | -10° to 400° | 3/8" | 150, 300 | 0000000 | 000000 |
Insert Check Valves with Sanitary Quick-Clamp Fittings for Food and Beverage
- For Use With: Beverage, Food
- Piston Material: 316 Stainless Steel
- Spring Material: 316 Stainless Steel
- Seal Material: EPDM Rubber
These compact valves fit into standard sanitary quick-clamp fittings. They have polished surfaces and are FDA compliant for use with food and beverage. All open to allow flow in one direction and close when flow stops or reverses. Body is 316 stainless steel for excellent corrosion resistance.
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.
For Tube OD | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Specifications Met | Each | |
316 Stainless Steel Body | ||||||||
---|---|---|---|---|---|---|---|---|
Quick Clamp × Quick Clamp | ||||||||
3/4" | 2.4 | 1,000 psi @ 100° F | 0.5 | -65° to 300° | 1 1/8" | FDA Compliant 21 CFR 177.2600 | 0000000 | 0000000 |
1" | 4.6 | 1,000 psi @ 100° F | 0.5 | -65° to 300° | 1 1/4" | FDA Compliant 21 CFR 177.2600 | 0000000 | 000000 |
1 1/2" | 9.5 | 1,000 psi @ 100° F | 0.5 | -65° to 300° | 1 3/4" | FDA Compliant 21 CFR 177.2600 | 0000000 | 000000 |
2" | 20.9 | 725 psi @ 100° F | 0.5 | -65° to 300° | 2 1/8" | FDA Compliant 21 CFR 177.2600 | 0000000 | 000000 |
3" | 77.9 | 725 psi @ 100° F | 0.5 | -65° to 300° | 3 5/16" | FDA Compliant 21 CFR 177.2600 | 0000000 | 000000 |