4820-01-139-1896

Find complete technical information, availability, and procurement data for: 4820-01-139-1896
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-139-1896

Item Name Code

05485

Assigment Date

09/26/1982 (43 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.

exposed spring bonnet type, threaded renewable seat ring type, threaded bonnet attachment method, diaphragm flow control device, 6 all ends bolt hole quantity

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: diaphragm
Bonnet Type: exposed spring
Bonnet Attachment Method: threaded
Renewable Seat Ring Type: threaded
Bolt Hole Quantity: 6 all ends
Maximum Operating Temp: -40.0 fahrenheit 1st response
Maximum Operating Temp: 180.0 fahrenheit 2nd response
Valve Operation Method: automatic
Flange Shape: round with holes all ends
Connection Type: flange all ends
Mounting Facility: bracket
Valve Size: 1.500 inches
Maximum Operating Pressure: 125.0 pounds per square inch single response
Nominal Outside Diameter: 5.062 inches all ends
Face To Face Distance: 8.000 inches
Nominal Thickness: 0.438 inches all ends
Bolt Hole Nominal Diameter: 0.562 inches all ends
Bolt Circle Nominal Diameter: 3.938 inches all ends
Flange Face Design: plain all ends
Material: copper alloy body
Material: nickel alloy seat
Material: nickel alloy stem
Material: rubber synthetic flow control device
Material Document And Classification: qq-n-281 fed spec single material response seat
Material Document And Classification: qq-n-288 fed spec single material response stem
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
74090 PART 74092	Globe Valve
74092-00	Globe Valve
74092J	Globe Valve

FAQs

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

What is the FSCG of the NSN 4820-01-139-1896?

The FSCG of the NSN 4820-01-139-1896 is 4820

Does the NSN 4820-01-139-1896 have a Schedule B code assigned?

Yes, the Schedule B code is 8481801070

Does NSN 4820-01-139-1896 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 4820-01-139-1896 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-139-1896 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 4820-01-139-1896 was assigned to the Federal Catalog?

It was assigned 43 years ago, on Sun, Sep 26, 1982