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4820-01-211-5100

Safety Relief Valve

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Official Item Classification

Name
Safety Relief Valve
(NSN) National Stock Number
4820-01-211-5100
(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
06/27/1985 (41 years ago)

plain,optional end(pipe) 2nd end connection style, poppet flow control device, automatic valve operation method, right-hand all ends thread direction, plain (pipe) 1st end connection style

Specs & Compatibility

Thread Direction

right-hand all ends

Flow Control Device

poppet

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

Nominal Thread Size

0.250 inches all ends

Opening Pressure Setting

7.0 pounds per square inch

Special Features

inline type

Material

rubber butadiene-acrylonitrile class nbr seat

Material

steel comp 303 body

Media For Which Designed

acetylene 2nd response

Media For Which Designed

air 1st response

Media For Which Designed

ammonia, gaseous 3rd response

Media For Which Designed

hydrogen 5th response

Media For Which Designed

refrigerant 12 4th response

Style Designator

straight thru note: to be used for valve bodies of one section only.

Thread Series Designator

npt all ends

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
559T-2MP-7 Safety Relief Valve
559T2MP7 Safety Relief Valve

Frequently Asked Questions

What is the FSCG of the NSN 4820-01-211-5100?
The FSCG of the NSN 4820-01-211-5100 is 4820
Does the NSN 4820-01-211-5100 have a Schedule B code assigned?
Yes, the Schedule B code is 8481400000
Does NSN 4820-01-211-5100 require demilitarization?
"commerce control list items (ccli) - mut to the point of scrap required outside the united states. Inside the united states, mut is required when the demil integrity code (ic) is "3" and mut is not required when the demic is "6" (note 8)"
Does NSN 4820-01-211-5100 contain precious materials?
Item does not contain precious metal.
Does NSN 4820-01-211-5100 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 4820-01-211-5100 was assigned to the Federal Catalog?
It was assigned 41 years ago, on Thu, Jun 27, 1985