A15-21-2

View detailed technical data, stock status, and sourcing information for: A15-21-2
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-288-6924

Item Name Code

05488

Assigment Date

01/01/1963 (63 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.

disk flow control device, plain (pipe) all ends connection style, spring disk loading method, right-hand all ends thread direction, 134.0 cubic feet per minute valve discharge flow rate

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: disk
Disk Loading Method: spring
Valve Discharge Flow Rate: 134.0 cubic feet per minute
Connection Style: plain (pipe) all ends
Valve Operation Method: automatic or manual
Connection Type: threaded external pipe all ends
Maximum Operating Pressure: 250.0 pounds per square inch single response
Nominal Thread Size: 1.000 inches all ends
Opening Pressure Setting: 50.0 pounds per square inch
Material: copper alloy body
Material: copper alloy flow control device
Material: copper alloy seat
Material: steel stem
Media For Which Designed: air single response
Style Designator: straight thru
Thread Series Designator: npt all ends

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2990-00-374-9432	No Name Available	01/01/1963
4310-00-379-0088	No Name Available	07/25/1969

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
1-1IN50LBAIR	Safety Relief Valve
15-1211	Safety Relief Valve
15-21-2	Safety Relief Valve
1A-1IN-50PSI-AIR	Safety Relief Valve
1A1IN50LBAIR	Safety Relief Valve
A15-21-2	Safety Relief Valve
FIG1AIN50LBAIR	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-288-6924?

The FSCG of the NSN 4820-00-288-6924 is 4820

Does the NSN 4820-00-288-6924 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-288-6924 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 4820-00-288-6924 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-288-6924 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 4820-00-288-6924 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963