4820-01-337-4518

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Safety Relief Valve

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Official Item Classification

Name: Safety Relief Valve
(NSN) National Stock Number: 4820-01-337-4518
(FSG) Federal Supply Group: 48 Valves
(FSC) Federal Supply Classification: 4820 Nonpowered Valves
(INC) Item Name Code: 05488
(FIIG) Federal Item Identification Guide: A046B0
Date: 04/14/1991 (35 years ago)

spring disk loading method, disk flow control device, integral bonnet attachment method, inside spring bonnet type, right-hand all ends thread direction

Specs & Compatibility

Thread Direction

right-hand all ends

Flow Control Device

disk

Bonnet Type

inside spring

Bonnet Attachment Method

integral

Disk Loading Method

spring

Connection Style

plain (pipe) 1st endplain,optional end(pipe) 2nd end

Valve Operation Method

automatic

Connection Type

threaded external pipe 1st endthreaded internal pipe 2nd end

Nominal Thread Size

1.250 inches all ends

Opening Pressure Setting

165.0 pounds per square inch

Material

copper alloy overall

Media For Which Designed

water, fresh single response

Style Designator

angle

Thread Series Designator

npt all ends

Regulatory Compliance

Precious Metals Indicator

Precious metal content is unknown

Criticality Code

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0005488

Related Hardware Products

Part Number	Description
508-0037-16-165	Safety Relief Valve
6779-04 SET 165 PSI	Safety Relief Valve
770NCFF-N	Safety Relief Valve

Frequently Asked Questions

What is the FSCG of the NSN 4820-01-337-4518?

The FSCG of the NSN 4820-01-337-4518 is 4820

Does the NSN 4820-01-337-4518 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-337-4518 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 4820-01-337-4518 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-337-4518 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 4820-01-337-4518 was assigned to the Federal Catalog?

It was assigned 35 years ago, on Sun, Apr 14, 1991