F-938-31 2 1/2IN

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-212-6792

Item Name Code

05487

Assigment Date

07/17/1985 (41 years ago)

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

disk flow control device, 4 all ends bolt hole quantity, automatic valve operation method, 550.0 fahrenheit single response maximum operating temp, weight disk loading method

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
Disk Loading Method: weight
Bolt Hole Quantity: 4 all ends
Maximum Operating Temp: 550.0 fahrenheit single response
Valve Operation Method: automatic
Flange Shape: round with holes all ends
Connection Type: flange all ends
Mounting Position: horizontal or vertical
Valve Size: 2.500 inches
Maximum Operating Pressure: 250.0 pounds per square inch single response
Nominal Outside Diameter: 7.000 inches all ends
Face To Face Distance: 8.500 inches
Nominal Thickness: 0.688 inches all ends
Bolt Hole Nominal Diameter: 0.625 inches all ends
Bolt Circle Nominal Diameter: 0.750 inches all ends
Flange Face Design: raised straight all ends
Raised Face Nominal Height: 0.062 inches all ends
Raised Face Nominal Diameter: 4.125 inches all ends
Material: copper alloy flow control device
Material: copper alloy seat
Material Document And Classification: astm a-395 assn std single material response body
Material Document And Classification: astm b-61 assn std single material response flow control device
Material Document And Classification: astm b-61 assn std single material response seat
Media For Which Designed: waste product 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
F-938-31 2 1/2IN	Check Valve
F-938-31 2.50 I	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-212-6792?

The FSCG of the NSN 4820-01-212-6792 is 4820

Does NSN 4820-01-212-6792 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 4820-01-212-6792 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-212-6792 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 4820-01-212-6792 was assigned to the Federal Catalog?

It was assigned 41 years ago, on Wed, Jul 17, 1985