Safety Relief Valve

Model / MPN: 646B-3-3/8-2 | NSN: 4820-01-516-3833

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

4820-01-516-3833

Sold in multiples of

1 EA

DEMIL

Thread Direction

Right-hand 2nd end

Thread Direction

Right-hand 1st end

Disk Loading Method

Spring

Maximum Operating Temp

250.0 degrees fahrenheit single response

Minimum Operating Temp

-40.0 degrees fahrenheit

Connection Style

G46b plain (pipe) 1st end

Connection Style

G9 plain, optional en (pipe) 2nd end

Valve Operation Method

Automatic

Connection Type

Threaded external pipe 1st end

Connection Type

Threaded internal pipe 2nd end

Adjustable Pressure Range

+40.0/+125.0 pounds per square inch

Thread Size

0.3750 inches 1st end

Thread Size

0.3750 inches 2nd end

Part Name Assigned By Controlling Agency

Differential area relief valve

Material

Steel comp 303 body

Thread Series Designator

Npt 2nd end

Thread Series Designator

Npt 1st end

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

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Safety Relief Valve

Pricing and Availability

Certified Quality Assurance

646B-3-3/8-2 Cross Reference