About Backflow-Prevention Valves
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Easy-to-Install Threaded Check Valves for Harsh Chemicals
To reduce installation time and allow for maintenance without detaching pipe connections, these valves have union fittings. The plastic body and fluoroelastomer seal provide excellent chemical resistance. Valves open to allow flow in one direction and close when flow stops or reverses.
Polypropylene valves are more corrosion resistant than PVC or CPVC 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 Use With: Air, Ammonia, Butane, Carbon Dioxide, Citric Acid, Deionized Water, Ethanol, Ethylene Glycol, Isopropyl Alcohol, Kerosene, Methanol, Natural Gas, Oil, Oxygen, Phosphoric Acid, Salt Water, Soap Solutions, Sodium Hydroxide, Water
- Ball Material: Polypropylene Plastic
- Seal Material: Fluoroelastomer Rubber
| Pipe Size  | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Specifications Met | Each | |
NPT Female × NPT Female | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 4.8 | 150 psi @ 70° F | 1 | 35° to 160° | White | 4 11/16" | ASTM D4101 | 0000000 | 0000000 |
| 3/4 | 7.7 | 150 psi @ 70° F | 1 | 35° to 160° | White | 4 3/4" | ASTM D4101 | 0000000 | 000000 |
| 1 | 11 | 150 psi @ 70° F | 1 | 35° to 160° | White | 5 3/8" | ASTM D4101 | 0000000 | 000000 |
| 1 1/2 | 45 | 150 psi @ 70° F | 1 | 35° to 160° | White | 6 3/4" | ASTM D4101 | 0000000 | 000000 |
| 2 | 130 | 150 psi @ 70° F | 1 | 35° to 160° | White | 8 1/8" | ASTM D4101 | 0000000 | 000000 |
Threaded Check Valves for Harsh Chemicals
These valves open to allow flow in one direction and close when flow stops or reverses.
Valves for drinking water meet NSF/ANSI Standard 61.
Polypropylene valves are more corrosion resistant than PVC or CPVC 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 Use With: Air, Butane, Carbon Dioxide, Citric Acid, Deionized Water, Diesel Fuel, Drinking Water, Ethanol, Ethylene Glycol, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Methanol, Mineral Spirits, Natural Gas, Oil, Oxygen, Phosphoric Acid, Propane, Salt Water, Soap Solutions, Sodium Hydroxide, Sodium Hypochlorite, Water
- Ball Material: PVC Plastic
- Seal Material: Fluoroelastomer Rubber
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Specifications Met | Each | |
NPT Female × NPT Female | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/4 | 1 | 150 psi @ 70° F | 1.5 | 35° to 140° | Dark Gray | 3" | ASTM D1784, NSF/ANSI 61 | 0000000 | 000000 |
| 3/8 | 3 | 150 psi @ 70° F | 1.5 | 35° to 140° | Dark Gray | 3" | ASTM D1784, NSF/ANSI 61 | 0000000 | 00000 |
| 3 | 250 | 150 psi @ 70° F | 1.5 | 35° to 140° | Dark Gray | 10 9/16" | ASTM D1784, NSF/ANSI 61 | 0000000 | 000000 |
| 4 | 400 | 150 psi @ 70° F | 1.5 | 35° to 140° | Dark Gray | 12 15/16" | ASTM D1784, NSF/ANSI 61 | 0000000 | 000000 |
Check Valves with Push-to-Connect Fittings for Harsh Chemicals
- For Use With: Air, Argon, Butane, Carbon Dioxide, Chlorine, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Gasoline, Helium, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Krypton, Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Phosphoric Acid, Propane, Salt Water, Soap Solutions, Sodium Hypochlorite, Sulfuric Acid, Toluene, Water, Xenon, Xylene
- Piston Material: PVDF Plastic
- Spring Material: Stainless Steel
- Seal Material: Fluoroelastomer Rubber
Connect your inlet tubing into the push-to-connect fittings—no heat, solder, or flux required. These valves have a PVDF body and a fluoroelastomer seal for excellent chemical resistance. They open to allow flow in one direction and close when flow stops or reverses.
| For Tube OD | Pipe Size | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
PVDF Plastic Body | ||||||||
|---|---|---|---|---|---|---|---|---|
Push-to-Connect Inlet × NPTF Male Outlet | ||||||||
| 3/8" | 1/4 | 300 psi @ 70° F | 0.5 | 0° to 250° | Black | 1 3/8" | 0000000 | 000000 |
Check Valves with Barbed Fittings for Harsh Chemicals
Prevent backflow in chemical tubing lines. These valves have barbed fittings that grip onto tubing, providing a secure hold. The plastic body and fluoroelastomer seal provide excellent chemical resistance. Valves open to allow flow in one direction and close when flow stops or reverses.
PVDF valve resists abrasion and UV light.
Polypropylene valves are more corrosion resistant than nylon valves.
Nylon valves are more impact resistant than polypropylene 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 Use With: Air, Butane, Chlorine, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Gasoline, Hydrochloric Acid, Nitric Acid, Oil, Propane, Salt Water, Soap Solutions, Sodium Hypochlorite, Sulfuric Acid, Water
- Diaphragm Material: Fluoroelastomer Rubber
- Seal Material: Fluoroelastomer Rubber
| For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
Barbed × Barbed | |||||||
|---|---|---|---|---|---|---|---|
| 1/4" | 15 psi @ 70° F | 0.5 | -20° to 250° | White | 1 21/32" | 00000000 | 00000 |
- For Use With: Acetone, Air, Argon, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Fuel Oil, Gasoline, Helium, Kerosene, Krypton, Mineral Spirits, Neon, Nitrogen, Oil, Propane, Salt Water, Soap Solutions, Toluene, Water, Xenon, Xylene
- Ball Material: 316 Stainless Steel
- Spring Material: 302 Stainless Steel
- Seal Material: Fluoroelastomer Rubber
- For Use With: Acetone, Air, Argon, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Fuel Oil, Gasoline, Helium, Kerosene, Krypton, Mineral Spirits, Neon, Nitrogen, Oil, Propane, Salt Water, Soap Solutions, Toluene, Water, Xenon, Xylene
- Ball Material: 316 Stainless Steel
- Spring Material: 302 Stainless Steel
- Seal Material: Fluoroelastomer Rubber
Flanged Check Valves for Harsh Chemicals
- For Use With: Ammonia, Chlorine, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Fuel Oil, Gasoline, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Methanol, Methyl Ethyl Ketone, Mineral Spirits, Oil, Phosphoric Acid, Salt Water, Soap Solutions, Toluene, Water, Xylene
- Ball Material: PTFE Plastic
- Seal Material: PTFE Plastic
Bolt these valves to ANSI flanges. The glass-filled vinyl ester body and PTFE seal stand up to a wide range of harsh chemicals. Valves 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.
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | For Flange Class | Flange OD | Number of Bolt Holes | Bolt Hole Size | Bolt Circle Dia. | Bolts Included | Each | |
Glass-Filled Vinyl Ester Body | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Flanged × Flanged | ||||||||||||||
| 1 | 35 | 200 psi @ 250 ° F | 1 | -40° to 250° | Beige | 5" | 150 | 4 1/4" | 4 | 5/8" | 3 1/8" | No | 000000 | 0000000 |
| 2 | 54 | 140 psi @ 250 ° F | 1 | -40° to 250° | Beige | 7" | 150 | 6" | 4 | 3/4" | 4 3/4" | No | 000000 | 000000 |