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Worldwide distributor of NSN parts and consumables located in the USA.

Check Valve

Model / MPN: 277A-4TB | NSN: 4820-01-315-0933
ITAR Registered seal

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

Product Details
NATO Stock Number
4820-01-315-0933
Sold in multiples of
1 EA
DEMIL
DEMIL/MLI
Thread Class
3a 1st end
Thread Class
3b 2nd end
Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Maximum Operating Temp
-40.0 degrees fahrenheit 1st response
Maximum Operating Temp
275.0 degrees fahrenheit 2nd response
Connection Style
Flared (tube) 1st end
Connection Style
Gasket seal (boss) 2nd end
Valve Operation Method
Automatic
Connection Type
Threaded external tube 1st end
Connection Type
Threaded internal boss 2nd end
Mounting Position
Horizontal or vertical
Thready Qty Per Inch (tpi)
20 all ends
Maximum Operating Pressure
3000.0 pounds per square inch single response
Thread Size
0.438 inches all ends
Seat Angle
37.0 degrees 1st end
Material
Aluminum alloy body
Media For Which Designed
Acetylene 2nd response
Media For Which Designed
Air 1st response
Media For Which Designed
Alcohol, ethyl 3rd response
Media For Which Designed
Ammonia, gaseous 4th response
Media For Which Designed
Carbon dioxide 5th response
Style Designator
Straight thru
Thread Series Designator
Unf 2nd end
Thread Series Designator
Unjf 1st end

Pricing and Availability

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277A-4TB Cross Reference
  • 277A4TBL