4820-01-057-3218

Find complete technical information, availability, and procurement data for: 4820-01-057-3218
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-057-3218

Item Name Code

05487

Assigment Date

03/10/1978 (48 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.

automatic valve operation method, round with holes all ends flange shape, disk flow control device, 4 all ends bolt hole quantity, 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
Valve Operation Method: automatic
Flange Shape: round with holes all ends
Connection Type: flange all ends
Mounting Position: horizontal or vertical
Valve Size: 1.000 inches
Maximum Operating Pressure: 300.0 pounds per square inch single response
Nominal Outside Diameter: 4.875 inches all ends
Face To Face Distance: 8.000 inches
Nominal Thickness: 0.688 inches all ends
Bolt Hole Nominal Diameter: 0.750 inches all ends
Bolt Circle Nominal Diameter: 3.500 inches all ends
Flange Face Design: plain all ends
Material: steel overall
Material Document And Classification: astm a351, grade cf8m assn std single material response overall
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
2620-927X11-ASS	Check Valve
2620-927X11-ASSY6C-1IN	Check Valve
2621-927-11ASSY1C	Check Valve
SS845-2181483AS	Check Valve
SS845-2181483ASSY6C-1IN	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-057-3218?

The FSCG of the NSN 4820-01-057-3218 is 4820

Does the NSN 4820-01-057-3218 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-01-057-3218 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 4820-01-057-3218 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-057-3218 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 4820-01-057-3218 was assigned to the Federal Catalog?

It was assigned 48 years ago, on Fri, Mar 10, 1978