Safety Relief Valve

Model / MPN: 577A-4D-12 | NSN: 4820-01-147-4951

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

4820-01-147-4951

Sold in multiples of

1 EA

DEMIL

Thread Class

3a 1st end

Thread Direction

Right-hand 1st end

Flow Control Device

Poppet

Disk Loading Method

Spring

Maximum Operating Temp

250.0 degrees fahrenheit single response

Valve Operation Method

Automatic

Connection Type

Threaded external tube 1st end

Maximum Operating Pressure

200.0 pounds per square inch single response

Thread Size

0.438 inches 1st end

Opening Pressure Setting

12.0 pounds per square inch

Material

Aluminum alloy 2024

Material Specification

Qq-a-225/6, t4 federal specification single material response

Media For Which Designed

Ammonia, gaseous 3rd response

Media For Which Designed

Fuel/oil, hydrocarbon 2nd response

Media For Which Designed

Gas, inert 1st response

Media For Which Designed

Hydrogen 4th response

Surface Treatment

Anodize

Thread Series Designator

Unf 1st end

577A Series Parts

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.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
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HAZMAT Certified
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577A-4D-12 Cross Reference

GV500HW4A12-77
GV500HW4A12-37
537A-4D-12
GV500HW4A12-77
537A-4D-12
GV500HW4A12-37
GV500HW4A12-77
537A-4D-12
GV500HW4A12-37
GV500HW4A12-77
537A-4D-12
GV500HW4A12-37