NPT Check Valves | McMaster-Carr

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System of Measurement

Pipe Size

Body Material

Stainless Steel

For Use With

Flammable Vapors

Ethylene Glycol

Thread Type

UN/UNF (SAE Straight)

Fitting Connection

Push to Connect

Gender

Minimum Opening Pressure

Material

Stainless Steel

Mounting Position

Maximum Pressure @ Temperature

50 psi @ 65° F

25 psi @ 70° F

50 psi @ 70° F

125 psi @ 70° F

150 psi @ 70° F

200 psi @ 70° F

220 psi @ 70° F

300 psi @ 70° F

400 psi @ 70° F

500 psi @ 70° F

600 psi @ 70° F

1,000 psi @ 70° F

1,500 psi @ 70° F

2,000 psi @ 70° F

3,000 psi @ 70° F

100 psi @ 75° F

1,975 psi @ 100° F

150 psi @ 140° F

Connects To

Check Valve Type

Spring-Loaded Ball

Spring-Loaded Piston

Shape

Actuation

Seal Material

Stainless Steel

Valve Type

Reduced Pressure Zone

Fitting Type

Maximum Temperature

Less than 250° F

250° F to 299° F

300° F to 399° F

400° F to 499° F

500° F or greater

Piston Material

Stainless Steel

Flow Coefficient (Cv)

End-to-End Length

RoHS

Compliant with Exemptions

REACH

DFARS Specialty Metals

Export Control Classification Number (ECCN)

How can we improve?

590 Products

Fluid Handling

Check Valves

Permit flow in only one direction by closing when flow stops or reverses

Backflow-Prevention Valves

Backflow-Prevention Valves

Dual checks stop flow from reversing and contaminating your system

Vacuum Breakers

Vacuum Breakers

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

Flame Arresters

Flame Arresters

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

Power Transmission

Air Flow Check Valves

Air Flow Check Valves

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

Fastening and Joining

Welding Gas Flashback Arresters

Welding Gas Flashback Arresters

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

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)