Safety Relief Valve

Model / MPN: 644XB-3-12-3 | NSN: 4820-01-449-8134

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes valve (1), relief, pressure and temperature.

Product Details

NATO Stock Number

4820-01-449-8134

Sold in multiples of

1 EA

DEMIL

Thread Class

3a all ends

Thread Direction

Right-hand all ends

Flow Control Device

Poppet

Disk Loading Method

Spring

End Application

Aircraft, awacs, e-3a

Connection Style

G42 flared (tube) all ends

Valve Operation Method

Automatic

Connection Type

Threaded external tube all ends

Thready Qty Per Inch (tpi)

12 all ends

Adjustable Pressure Range

+40.0/+50.0 pounds per square inch

Maximum Operating Pressure

3600.0 pounds per square inch single response

Thread Size

1.062 inches all ends

Seat Angle

37.0 degrees all ends

Material

Stainless steel body

Thread Series Designator

Unj all ends

644XB3 Series Parts

Pricing and Availability

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644XB-3-12-3 Cross Reference

644XB-3-12-27