B-309 1 1/4 IN

View detailed technical data, stock status, and sourcing information for: B-309 1 1/4 IN
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-279-2982

Item Name Code

05487

Assigment Date

05/16/1988 (38 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.

1.250 inches all ends nominal pipe size accommodated, plain, optional end (pipe) all ends connection style, disk flow control device, 75.0 fahrenheit 1st response maximum operating temp, 100.0 fahrenheit 2nd response maximum operating temp

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: 1.250 inches all ends
Flow Control Device: disk
Maximum Operating Temp: 100.0 fahrenheit 2nd response
Maximum Operating Temp: 75.0 fahrenheit 1st response
Connection Style: plain, optional end (pipe) all ends
Valve Operation Method: automatic
Connection Type: unthreaded internal pipe all ends
Mounting Position: horizontal
Maximum Operating Pressure: 15.0 pounds per square inch 1st response
Maximum Operating Pressure: 175.0 pounds per square inch 2nd response
Special Features: swing check type
Material: copper alloy 836 body
Material: copper alloy 836 flow control device
Material Document And Classification: astm b-62 assn std single material response body
Material Document And Classification: astm b-62 assn std single material response flow control device
Media For Which Designed: steam 1st response
Media For Which Designed: water-oil-gas 2nd response
Style Designator: straight thru
Specification/Standard Data: 81349-mil-v-18346 government specification

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
B-309 1 1/4 IN	Check Valve
BV1187-136	Check Valve
MIL-V-18346	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-279-2982?

The FSCG of the NSN 4820-01-279-2982 is 4820

Does the NSN 4820-01-279-2982 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301010

Does NSN 4820-01-279-2982 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 4820-01-279-2982 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-279-2982 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 4820-01-279-2982 was assigned to the Federal Catalog?

It was assigned 38 years ago, on Mon, May 16, 1988