GV500HW4A12-77

View detailed technical data, stock status, and sourcing information for: GV500HW4A12-77
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-147-4951

Item Name Code

05488

Assigment Date

02/17/1983 (43 years ago)

A multi-ported, nonlubricated valve designed to provide straight through flow or ability to direct a number of flows or pressure through a single valve. The flow is controlled by the rotation of a ported ball within a suitable ported seat(s). The ball is usually engaged by a stem. It is normally operated in an open or closed position. Excludes:valve, check.

spring disk loading method, right-hand 1st end thread direction, 250.0 fahrenheit single response maximum operating temp, 3a 1st end thread class, poppet flow control device

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3a 1st end
Thread Direction: right-hand 1st end
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: 250.0 fahrenheit single response
Connection Style: gasket seal (tube) 1st end
Valve Operation Method: automatic
Connection Type: threaded external tube 1st end
Maximum Operating Pressure: 200.0 pounds per square inch single response
Nominal Thread Size: 0.438 inches 1st end
Opening Pressure Setting: 12.0 pounds per square inch
Material: aluminum alloy 2024 overall
Material Document And Classification: qq-a-225/6,t4 fed spec single material response overall
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
Style Designator: straight thru
Thread Series Designator: unf 1st end

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
537A-4D-12	Safety Relief Valve
577A-4D-12	Safety Relief Valve
GV500HW4A12-37	Safety Relief Valve
GV500HW4A12-77	Safety Relief Valve

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 4820-01-147-4951?

The FSCG of the NSN 4820-01-147-4951 is 4820

Does the NSN 4820-01-147-4951 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-147-4951 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 4820-01-147-4951 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-147-4951 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 4820-01-147-4951 was assigned to the Federal Catalog?

It was assigned 43 years ago, on Thu, Feb 17, 1983