NS-3981 ASSEMBLY H 3.00IPS

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-217-4707

Item Name Code

05487

Assigment Date

09/27/1985 (40 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.

round with holes all ends flange shape, 8 all ends bolt hole quantity, disk flow control device, 150.0 fahrenheit single response maximum operating temp, automatic valve operation 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
Bolt Hole Quantity: 8 all ends
Maximum Operating Temp: 150.0 fahrenheit single response
Valve Operation Method: automatic
Flange Shape: round with holes all ends
Connection Type: flange all ends
Mounting Position: horizontal
Valve Size: 3.000 inches
Maximum Operating Pressure: 700.0 pounds per square inch single response
Nominal Outside Diameter: 7.437 inches all ends
Face To Face Distance: 11.750 inches
Nominal Thickness: 1.375 inches all ends
Bolt Hole Nominal Diameter: 0.875 inches all ends
Bolt Circle Nominal Diameter: 5.937 inches all ends
Flange Face Design: plain all ends
Material: copper alloy body
Media For Which Designed: water-oil-gas single response
Style Designator: straight thru flanged ends

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-01-184-0390	No Name Available	09/01/1987

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
90034-000	Check Valve
90034003	Check Valve
90202-000	Check Valve
NS-3981 ASSEMBLY H 3.00IPS	Check Valve
NS3981 ASSEMBLY BC 3IN	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-217-4707?

The FSCG of the NSN 4820-01-217-4707 is 4820

Does the NSN 4820-01-217-4707 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-01-217-4707 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 4820-01-217-4707 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-217-4707 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 4820-01-217-4707 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Fri, Sep 27, 1985