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D4792B Safety Relief Valve

4820-00-801-7850

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Official Item Classification

Name
Safety Relief Valve
Part Number
D4792B
(NSN) National Stock Number
4820-00-801-7850
(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
01/01/1963 (63 years ago)

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

Specs & Compatibility

Thread Direction

right-hand all ends

Flow Control Device

disk

Bonnet Type

inside spring

Bonnet Attachment Method

threaded

Disk Loading Method

spring

Maximum Operating Temp

550.0 fahrenheit single response

Connection Style

plain (pipe) 1st end

Connection Style

plain,optional end(pipe) 2nd end

Valve Operation Method

automatic

Connection Type

threaded external pipe 1st end

Connection Type

threaded internal pipe 2nd end

Features Provided

pressure tight outlet side

Adjustable Pressure Range

+1.0 to 250.0 pounds per square inch

Maximum Operating Pressure

250.0 pounds per square inch single response

Material

copper alloy overall

Media For Which Designed

steam 1st response

Media For Which Designed

water-oil-gas 2nd response

Style Designator

angle

Thread Series Designator

npt all ends

Replacement For

Part Number Description
4820-00-289-8206 No Name Available 08/01/1998
4820-00-541-2355 No Name Available 01/01/1963

Regulatory Compliance

Precious Metals Indicator
U

Precious metal content is unknown

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.

Source of Supply Code

SMS

Pseudo Item Name Code

0005488

Related Hardware Products

Part Number Description
0020-E02-MG0026 Safety Relief Valve
20-1 Safety Relief Valve
D4792B Safety Relief Valve
FIG 286 1 1/2 IN Safety Relief Valve
KUN20-E02-MC Safety Relief Valve

Frequently Asked Questions

What is the FSCG of the NSN 4820-00-801-7850?
The FSCG of the NSN 4820-00-801-7850 is 4820
Does the NSN 4820-00-801-7850 have a Schedule B code assigned?
Yes, the Schedule B code is 8481400000
Does NSN 4820-00-801-7850 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 4820-00-801-7850 contain precious materials?
Precious metal content is unknown
Does NSN 4820-00-801-7850 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 4820-00-801-7850 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963