12918581

View detailed technical data, stock status, and sourcing information for: 12918581
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-313-4129

Item Name Code

05488

Assigment Date

01/09/1990 (36 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.

spring disk loading method, 275.0 fahrenheit single response maximum operating temp, poppet flow control device, 3a all ends thread class, right-hand all ends thread direction

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 all ends
Thread Direction: right-hand all ends
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: 275.0 fahrenheit single response
Connection Style: external seat for gasket seal (boss) all ends
Valve Operation Method: automatic
Connection Type: threaded external boss all ends
Adjustable Pressure Range: +3.0 to 7.0 pounds per square inch
Maximum Operating Pressure: 150.0 pounds per square inch single response
Nominal Thread Size: 0.438 inches all ends
Seat Angle: 37.0 degrees all ends
Opening Pressure Setting: 5.0 pounds per square inch
Special Features: end connections modified without cone points
Material: aluminum body
Material: aluminum flow control device
Media For Which Designed: air single response
Media For Which Designed: nitrogen, gaseous 1st response
Style Designator: straight thru note: to be used for valve bodies of one section only.
Thread Series Designator: unjf 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
10062703	Safety Relief Valve
12918581	Safety Relief Valve
SM-C-772307-4	Safety Relief Valve
Z02RV04-12	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-313-4129?

The FSCG of the NSN 4820-01-313-4129 is 4820

Does the NSN 4820-01-313-4129 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-313-4129 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 4820-01-313-4129 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-313-4129 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 4820-01-313-4129 was assigned to the Federal Catalog?

It was assigned 36 years ago, on Tue, Jan 9, 1990