Safety Relief Valve NSN 4820-00-990-4295

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: 4820-00-990-4295

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Features and Characteristics

Thread Direction

Right-hand 1st endright-hand 2nd end

Flow Control Device

Poppet

Bonnet Type

Inside spring

Bonnet Attachment Method

Threaded

Disk Loading Method

Spring

Maximum Operating Temp

550.0 degrees fahrenheit single response

Connection Style

G9 plain, optional en (pipe) 1st endg46b plain (pipe) 2nd end

Valve Operation Method

Automatic

Connection Type

Threaded internal pipe 1st endthreaded external pipe 2nd end

Features Provided

Pressure tight outlet side

Adjustable Pressure Range

+1.0/+250.0 pounds per square inch

Maximum Operating Pressure

250.0 pounds per square inch single response

Thread Size

0.750 inches 1st end0.500 inches 2nd end

Opening Pressure Setting

28.0 pounds per square inch

Material

Copper alloy bodycopper alloy flow control devicecopper alloy seat

Style Designator

Err-090

Thread Series Designator

Npt 1st endnpt 2nd end

FSC

4820 Nonpowered Valves

NIIN

009904295

NSN

4820009904295

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

342C722H07

Cage Code:

79500

Status:

MSDS:

Part Number:

1213

Cage Code:

37239

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 4820-00-990-4295

What are the manufacturers of nsn 4820009904295?

Westinghouse Electric Corp (79500)
Northrop Grumman Systems Corporation (97942)
Lunkenheimer Co (37239)

Does this nsn 4820009904295 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 4820009904295
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 4820009904295 contain any precious metals?
Precious metal content is unknown.

Does nsn 4820009904295 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 4820009904295?
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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