Gas Check Valves | McMaster-Carr

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2B350

2B999

EAR99

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DFARS Specialty Metals

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573 Products

Check Valves

Threaded Check Valves

Open to allow flow in one direction and close when flow stops or reverses

117 products

High-Flow Threaded Check Valves

Internal components reduce flow resistance for the maximum possible flow

57 products

Check Valves with Yor-Lok Fittings

Two sleeves give the fittings extra gripping power

18 products

Check Valves with Barbed Fittings

Barbs grip onto tubing, providing a secure hold

47 products

Flange-Mount Check Valves

Sandwich between two ANSI flanges for backflow prevention that adds little weight or space

8 products

High-Pressure Threaded Check Valves

Rated for up to twice the pressure of standard check valves

18 products

Socket-Connect Check Valves

Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection

10 products

Compact Flange-Mount Check Valves

Less than half the length of other flange-mount check valves for limited-clearance pipelines

8 products

Plastic Threaded Check Valves

Plastic provides a lightweight alternative to metal

10 products

High-Temperature Threaded Check Valves

The rubber seal withstands temperatures up to 500° F

28 products

Check Valves with Push-to-Connect Fittings

Insert tubing into the fitting without needing heat, solder, or flux

8 products

Compact Threaded Check Valves

A shorter end-to-end length than other check valves to fit in tight spaces

18 products

Heavy Duty Check Valves with Barbed Fittings

A stainless steel body makes these more durable than plastic barbed check valves

15 products

High-Cycling Threaded Check Valves

Few moving parts to wear out from frequent opening, pulsating flow, and rapid reversal

12 products

Butt-Weld Check Valves

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

5 products

Union-Insert Check Valves

Reduce installation time and allow for maintenance without detaching pipe connections

8 products

Check Valves for Harsh Chemicals

Easy-Install Threaded Check Valves for Harsh Chemicals

Reduce installation time and allow for maintenance without detaching pipe connections

19 products

Threaded Check Valves for Harsh Chemicals

Open to allow flow in one direction and close when flow stops or reverses

10 products

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

Insert tubing into the fitting without needing heat, solder, or flux

1 product

Socket-Connect Check Valves for Harsh Chemicals

Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection

11 products

Check Valves with Barbed Fittings for Harsh Chemicals

Barbs grip onto tubing, providing a secure hold

7 products

Ultra-Chemical-Resistant Threaded Check Valves

A PFA body withstands methyl ethyl ketone, sodium hypochlorite, and other harsh chemicals

5 products

Flanged Check Valves for Harsh Chemicals

Bolt to ANSI flanges

2 products

Clear-View Socket-Connect Check Valves for Harsh Chemicals

Inspect flow and debris accumulation through the transparent valve body

3 products

Check Valves for Oil and Fuel

Flange-Mount Check Valves for Oil and Fuel

Install between ANSI flanges

6 products

Threaded Check Valves for Oil and Fuel

Open to allow flow in one direction and close when flow stops or reverses

18 products

High-Performance Threaded Check Valves for Fuel

Withstand pressures up to 1,975 psi and temperatures up to 800° F

12 products

Plastic Threaded Check Valves for Oil and Fuel

Plastic provides a lightweight alternative to metal

13 products

High-Temperature Threaded Check Valves for Oil and Fuel

A fluoroelastomer seal withstands temperatures up to 500° F

6 products

High-Pressure Threaded Check Valves for Oil and Fuel

Rated for at least four times the pressure of standard check valves for oil and fuel

12 products

Socket-Connect Check Valves for Oil and Fuel

Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection

6 products

Welding Gas Check Valves

Welding Gas Check Valves for Regulators

Stop the reverse flow of gas in your regulator

2 products

Welding Gas Check Valves for Torches

Stop the reverse flow of gas in your torch

3 products

Check Valves for Refrigerant

Use in refrigeration and air-conditioning systems

4 products

Other Products

Vacuum Breakers

When pressure drops, vents open to prevent suction from drawing liquid back upstream

16 products

Flame Arresters

Absorb heat from a fire in your gas pipeline to stop it from traveling back to the gas source

6 products

Welding Gas Flashback Arresters

Attach to your gas welder to extinguish flames and stop reverse gas flow

24 products