4820-01-431-9201

Find complete technical information, availability, and procurement data for: 4820-01-431-9201
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-431-9201

Item Name Code

20962

Assigment Date

05/21/1996 (30 years ago)

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.

plain,optional end(pipe) all ends connection style, divers life support system, transportable re-compression chamber system end item identification, manual valve operation method, right-hand all ends thread direction, threaded internal pipe all ends connection type

Product Characteristics

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

Thread Direction: right-hand all ends
End Item Identification: divers life support system, transportable re-compression chamber system
Connection Style: plain,optional end(pipe) all ends
Valve Operation Method: manual
Connection Type: threaded internal pipe all ends
Nominal Thread Size: 0.500 inches all ends
Special Features: cres 303/304 trim with black lever handle
Material: copper alloy body
Material: plastic polytetrafluoroethylene seat
Material: steel corrosion resisting flow control device
Material: steel corrosion resisting stem
Style Designator: straight thru
Thread Series Designator: npt all ends

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
B-63TF8-QT-B	Ball Valve
B-63TF8-QT-BK	Ball Valve
B-63TF8-ST	Ball Valve

FAQs

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

What is the FSCG of the NSN 4820-01-431-9201?

The FSCG of the NSN 4820-01-431-9201 is 4820

Does NSN 4820-01-431-9201 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 4820-01-431-9201 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-431-9201 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 4820-01-431-9201 was assigned to the Federal Catalog?

It was assigned 30 years ago, on Tue, May 21, 1996