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4820-01-172-2091

Safety Relief Valve

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Official Item Classification

Name
Safety Relief Valve
(NSN) National Stock Number
4820-01-172-2091
(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
02/16/1984 (42 years ago)

bolted bonnet attachment method, spring disk loading method, inside screw bonnet type, disk flow control device, 250.0 fahrenheit single response maximum operating temp

Specs & Compatibility

Flow Control Device

disk

Bonnet Type

inside screw

Bonnet Attachment Method

bolted

Disk Loading Method

spring

Maximum Operating Temp

250.0 fahrenheit single response

Connection Style

socket (tube) all ends

Valve Operation Method

automatic

Connection Type

unthreaded internal tube all ends

Adjustable Pressure Range

+15.0 to 18.0 pounds per square inch

Maximum Operating Pressure

400.0 pounds per square inch single response

Nominal Outside Diameter Tube Accommodated

0.500 inches all ends

Material

copper alloy body

Material

nickel alloy flow control device

Material

nickel alloy seat

Material

steel corrosion resisting stem

Media For Which Designed

air 1st response

Media For Which Designed

gas, inert 2nd response

Style Designator

angle

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
R10BD1D105 AND D48677 Safety Relief Valve

Frequently Asked Questions

What is the FSCG of the NSN 4820-01-172-2091?
The FSCG of the NSN 4820-01-172-2091 is 4820
Does the NSN 4820-01-172-2091 have a Schedule B code assigned?
Yes, the Schedule B code is 8481400000
Does NSN 4820-01-172-2091 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 4820-01-172-2091 contain precious materials?
Item does not contain precious metal.
Does NSN 4820-01-172-2091 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 4820-01-172-2091 was assigned to the Federal Catalog?
It was assigned 42 years ago, on Thu, Feb 16, 1984