Safety Relief Valve NSN 4820-01-267-4998

Item Description

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes valve (1), relief, pressure and temperature.

NSN: 4820-01-267-4998

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Features and Characteristics

Flow Control Device

Disk

Bonnet Type

Inside screw

Bonnet Attachment Method

Threaded

Disk Loading Method

Spring

Maximum Operating Temp

165.0 degrees fahrenheit single response

Connection Style

Plain (tube) err-100

Valve Operation Method

Automatic

Connection Type

Unthreaded internal tube all ends

Adjustable Pressure Range

+2901.0/+4000.0 pounds per square inch

Maximum Operating Pressure

6000.0 pounds per square inch single response

Criticality Code Justification

Zzzy

Opening Pressure Setting

2901.0 pounds per square inch

Outside Diameter Tube Accommodated

0.500 inches all ends

Material

Nickel alloy 400 stem or nickel alloy r-405 stem

Material Specification

Qq-n-281, cl a federal specification 1st material response stem or qq-n-281, cl b federal specification 2nd material response stem

Media For Which Designed

Oxygen, gaseous single response

Style Designator

Err-090

Reference Number Differentiating Characteristics

Requires special cleaning and packaging iaw mil-c-52211, for oxygen/nitrogen/hydrogen service

FSC

4820 Nonpowered Valves

NIIN

012674998

NSN

4820012674998

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

20357-7-940-101

Cage Code:

15187

Status:

MSDS:

Part Number:

20357-7-940-101CP

Cage Code:

03950

Status:

MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov

Schedule B Number: 8481400000
NAICS: 332911
SITC: 74740
Description: Safety or relief valves
End Use (Code 21180):
Industrial machines, other

Q & A

Frequently asked questions for NSN 4820-01-267-4998

What are the manufacturers of nsn 4820012674998?

Does this nsn 4820012674998 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 4820012674998
A valve designed to automatically release excessive pressures. it is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. it is not designed for regulation of continuously fluctuating loads. it may be inline or cartridge (manifold) design. excludes valve (1), relief, pressure and temperature.

Does nsn 4820012674998 contain any precious metals?
No precious metal content.

Does nsn 4820012674998 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 4820012674998?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)

INC

FIIG

App. Key

Cond. Code

Status

INC:

05488

FIIG:

A046B0

App. Key:

Cond. Code:

Status:

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Certificate of Conformance
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