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4820-01-236-5978

Safety Relief Valve

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Official Item Classification

Name
Safety Relief Valve
(NSN) National Stock Number
4820-01-236-5978
(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
07/18/1986 (40 years ago)

threaded bonnet attachment method, spring disk loading method, 180.0 fahrenheit single response maximum operating temp, disk flow control device, inside screw bonnet type

Specs & Compatibility

Flow Control Device

disk

Bonnet Type

inside screw

Bonnet Attachment Method

threaded

Disk Loading Method

spring

Maximum Operating Temp

180.0 fahrenheit single response

Connection Style

socket with brazing ring (tube) all ends

Valve Operation Method

automatic

Connection Type

unthreaded internal tube all ends

Adjustable Pressure Range

+65.0 to 100.0 pounds per square inch

Maximum Operating Pressure

300.0 pounds per square inch single response

Material

copper alloy body

Material

nickel alloy stem

Material

rubber synthetic seat

Material Document And Classification

astm b-61 assn std single material response body

Material Document And Classification

qq-n-281,class a fed spec single material response stem

Media For Which Designed

water, salt single response

Style Designator

angle

Furnished Items And Quantity

1 lever and 2 nut and 2 tailpiece

Regulatory Compliance

Precious Metals Indicator
A

Item does not contain precious metal.

Criticality Code
X

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

Hazardous Metals Indicator
N

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
C3459 PL4142 65T 100PSI Safety Relief Valve

Frequently Asked Questions

What is the FSCG of the NSN 4820-01-236-5978?
The FSCG of the NSN 4820-01-236-5978 is 4820
Does the NSN 4820-01-236-5978 have a Schedule B code assigned?
Yes, the Schedule B code is 8481400000
Does NSN 4820-01-236-5978 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 4820-01-236-5978 contain precious materials?
Item does not contain precious metal.
Does NSN 4820-01-236-5978 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 4820-01-236-5978 was assigned to the Federal Catalog?
It was assigned 40 years ago, on Fri, Jul 18, 1986