4820-01-340-1255

Find complete technical information, availability, and procurement data for: 4820-01-340-1255
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-340-1255

Item Name Code

05488

Assigment Date

06/10/1991 (35 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, right-hand all ends thread direction, poppet flow control device, automatic valve operation method, spring disk loading method

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
Flow Control Device: poppet
Disk Loading Method: spring
Connection Style: plain,optional end(pipe) all ends
Valve Operation Method: automatic
Connection Type: threaded internal pipe all ends
Adjustable Pressure Range: +1710.0 to 2570.0 pounds per square inch
Maximum Operating Pressure: 10500.0 pounds per square inch single response
Nominal Thread Size: 0.500 inches all ends
Material: plastic polyamide (nylon) flow control devicesteel comp 303 stem
Media For Which Designed: air 1st responsehelium 2nd responsegas, natural 3rd responseoil, hydraulic 4th responsewater, fresh 5th response
Style Designator: straight thru note: to be used for valve bodies of one section only.
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
5377-2PP-2060	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-340-1255?

The FSCG of the NSN 4820-01-340-1255 is 4820

Does the NSN 4820-01-340-1255 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-340-1255 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 4820-01-340-1255 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-340-1255 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 4820-01-340-1255 was assigned to the Federal Catalog?

It was assigned 35 years ago, on Mon, Jun 10, 1991