4820-00-933-5987

Find complete technical information, availability, and procurement data for: 4820-00-933-5987
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-933-5987

Item Name Code

27828

Assigment Date

09/09/1966 (59 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.

right-hand all ends thread direction, threaded renewable seat ring type, automatic valve operation method, weight disk loading method, plain, optional end (pipe) all ends connection style

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
Disk Loading Method: weight
Renewable Seat Ring Type: threaded
Connection Style: plain, optional end (pipe) all ends
Valve Operation Method: automatic
Connection Type: threaded internal pipe all ends
Mounting Position: horizontal
Maximum Operating Pressure: 200.0 pounds per square inch 1st response
Maximum Operating Pressure: 400.0 pounds per square inch 2nd response
Special Features: renewable plug type discs; valve should be installed with pressure underthe discs
Material: copper alloy body
Material: nickel alloy flow control device
Material: nickel and copper alloy seat
Material Document And Classification: astm b-61 assn std single material response body
Material Document And Classification: astm b-64 class b assn std single material response flow control device
Material Document And Classification: astm wpc alloy no.56 assn std single material response seat
Media For Which Designed: steam 1st response
Media For Which Designed: water-oil-gas 2nd response
Style Designator: straight thru
Supplementary Features: flow control device: plug
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
6-1-1910-20-264	Lift-Check Valve
FIG54-1/4X2-1/8X1-13/32	Lift-Check Valve
FIG99A	Lift-Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-933-5987?

The FSCG of the NSN 4820-00-933-5987 is 4820

Does NSN 4820-00-933-5987 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 4820-00-933-5987 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-933-5987 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 4820-00-933-5987 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Fri, Sep 9, 1966