Check Valves for Neon | McMaster-Carr

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395 Products

About Backflow-Prevention Valves

Threaded Check Valves

For use with threaded pipe, these valves are available with NPT, NPTF, BSPP, BSPT, and UNI/UNF (JIC) connections.

High-Flow Threaded Check Valves

To achieve the maximum possible flow, internal components are designed to reduce flow resistance.

Plastic Threaded Check Valves

Plastic provides a lightweight alternative to metal.

High-Pressure Threaded Check Valves

Rated for up to twice the pressure of standard check valves, these can withstand pressures up to 3,000 psi.

High-Temperature Threaded Check Valves

The heat-resistant rubber seal withstands temperatures up to 500° F.

High-Cycling Threaded Check Valves

With few moving parts to wear out, these valves withstand frequent opening and closing, pulsating flow, and rapid flow reversal.

Check Valves with Barbed Fittings

Barbs grip onto tubing, providing a secure hold.

Heavy Duty Check Valves with Barbed Fittings

For more durability than plastic barbed check valves, these have a stainless steel body.

Flange-Mount Check Valves

Sandwich these valves between two ANSI flanges for backflow prevention at a fraction of the weight of flanged check valves and a reduced pipeline footprint.

Compact Flange-Mount Check Valves

Less than half the end-to-end length of standard flange-mount check valves, these can be installed in pipelines with limited clearance.

Check Valves with Yor-Lok Fittings

Two sleeves give the fittings extra gripping power. They bite into tubing as you tighten the nut to form a strong seal. All are compatible with Swagelok®, Let-Lok, and Parker A-Lok fittings.

Check Valves with Push-to-Connect Fittings

Insert tubing into the fitting—no heat, solder, or flux required.

Socket-Connect Check Valves

Weld to unthreaded metal pipe.

Butt-Weld Check Valves

Weld these valves to unthreaded pipe for a smooth, flush connection that provides maximum flow.

Union-Insert Check Valves

To reduce installation time and allow for maintenance without detaching pipe connections, these valves insert into a union fitting.

Check Valves with Barbed
Fittings for Harsh Chemicals

Barbs grip onto tubing, providing a secure hold.

Check Valves with Push-to-Connect
Fittings for Harsh Chemicals

Insert tubing into the fittings—no heat, solder, or flux required.

Vacuum-Breaking Valves

Commonly used with irrigation systems and laboratory equipment, these valves have NPT connections.

High-Pressure Vacuum-Breaking Valves

Rated for 12 times the pressure of standard vacuum-breaking valves, these can handle up to 1,500 psi. Connections are NPT.

Vacuum-Breaking Valves for Chemicals

A plastic body withstands pH neutralizing, cleaning, and plating solutions containing sodium hydroxide, methyl ethyl ketone, and other harsh chemicals.

About Backflow-Prevention Valves

Check Valves

Threaded Check Valves

High-Flow Threaded Check Valves

Plastic Threaded Check Valves

High-Pressure Threaded Check Valves

High-Temperature Threaded Check Valves

High-Cycling Threaded Check Valves

Check Valves with Barbed Fittings

Heavy Duty Check Valves with Barbed Fittings

Flange-Mount Check Valves

Compact Flange-Mount Check Valves

Check Valves with Yor-Lok Fittings

Check Valves with Push-to-Connect Fittings

Socket-Connect Check Valves

Butt-Weld Check Valves

Union-Insert Check Valves

Check Valves with BarbedFittings for Harsh Chemicals

Check Valves with Push-to-ConnectFittings for Harsh Chemicals

Vacuum-Breaking Valves

Vacuum-Breaking Valves

High-Pressure Vacuum-Breaking Valves

Vacuum-Breaking Valves for Chemicals

Check Valves with Barbed
Fittings for Harsh Chemicals

Check Valves with Push-to-Connect
Fittings for Harsh Chemicals