4820-01-250-4121

Find complete technical information, availability, and procurement data for: 4820-01-250-4121
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-250-4121

Item Name Code

05487

Assigment Date

03/01/1987 (39 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.

poppet flow control device, plain (pipe) 2nd end connection style, 0.311 inches 2nd end nominal pipe size accommodated, 131.0 fahrenheit single response maximum operating temp, plain (tube) 1st end connection style

Product Characteristics

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

Nominal Pipe Size Accommodated: 0.311 inches 2nd end
Flow Control Device: poppet
Maximum Operating Temp: 131.0 fahrenheit single response
Connection Style: plain (tube) 1st end
Connection Style: plain (pipe) 2nd end
Valve Operation Method: automatic
Connection Type: unthreaded external tube 1st end
Connection Type: unthreaded external pipe 2nd end
Mounting Position: horizontal
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Outside Diameter Tube Accommodated: 0.172 inches 1st end
Special Features: media requires a mixture of 67percent-ethylene and 33percent-water by volume;cartridge type
Material: plastic polypropylene packing
Material: steel comp 303 body
Media For Which Designed: ethylene glycol 1st response
Media For Which Designed: water, fresh 2nd response
Style Designator: straight thru

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
330118P01	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-250-4121?

The FSCG of the NSN 4820-01-250-4121 is 4820

Does the NSN 4820-01-250-4121 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-01-250-4121 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 4820-01-250-4121 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-250-4121 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 4820-01-250-4121 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Sun, Mar 1, 1987