1281-N

View detailed technical data, stock status, and sourcing information for: 1281-N
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-349-7227

Item Name Code

05487

Assigment Date

12/03/1991 (34 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.

180.0 fahrenheit single response maximum operating temp, disk flow control device, 8 all ends bolt hole quantity, automatic valve operation method, round with holes all ends flange shape

Product Characteristics

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

Flow Control Device: disk
Bolt Hole Quantity: 8 all ends
Maximum Operating Temp: 180.0 fahrenheit single response
Valve Operation Method: automatic
Flange Shape: round with holes all ends
Connection Type: flange all ends
Mounting Position: horizontal
Valve Size: 4.000 inches
Maximum Operating Pressure: 150.0 pounds per square inch single response
Nominal Outside Diameter: 7.688 inches all ends
Face To Face Distance: 11.750 inches
Nominal Thickness: 0.500 inches all ends
Bolt Hole Nominal Diameter: 0.562 inches all ends
Bolt Circle Nominal Diameter: 6.562 inches all ends
Flange Face Design: plain all ends
Material: copper alloy body
Material: nickel alloy flow control device
Media For Which Designed: water-oil-gas single response
Style Designator: straight thru flanged 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
1281-005 4 INCH	Check Valve
1281-005 400	Check Valve
1281-N	Check Valve
5021BM-0400	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-349-7227?

The FSCG of the NSN 4820-01-349-7227 is 4820

Does the NSN 4820-01-349-7227 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-01-349-7227 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 4820-01-349-7227 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-349-7227 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 4820-01-349-7227 was assigned to the Federal Catalog?

It was assigned 34 years ago, on Tue, Dec 3, 1991