Safety Relief Valve NSN 4820-01-268-2274

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: 4820-01-268-2274

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Features and Characteristics

Thread Direction

Right-hand 1st end

Flow Control Device

Disk

Disk Loading Method

Spring

Maximum Operating Temp

450.0 degrees fahrenheit single response

Connection Style

G9 plain, optional en (pipe) 2nd end

Connection Type

Threaded internal pipe 2nd end

Maximum Operating Pressure

300.0 pounds per square inch single response

Thread Size

0.750 inches 2nd end

Criticality Code Justification

Zzzy

Opening Pressure Setting

75.0 pounds per square inch

Material

Copper alloy

Media For Which Designed

Air single response

Style Designator

Err-090

Thread Series Designator

Npt 1st end

Specification Data

96906-mil-std-129 government standard and 96906-mil-std-767 government standard and 96906-aor-767-1 government standard and 81349-mil-i-45208 government specification

Reference Number Differentiating Characteristics

Material will be in accordance with ships parts control center activity hx quality control, manufacturing and testing specifications

FSC

4820 Nonpowered Valves

NIIN

012682274

NSN

4820012682274

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

1856M-OL-1/2X3/4-75PSI

Cage Code:

72352

Status:

MSDS:

Part Number:

18252-F(75PSI)

Cage Code:

72352

Status:

MSDS:

Part Number:

1896M-OL-1/2X3/4-75PSI(SPCLN)

Cage Code:

72352

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 4820-01-268-2274

What are the manufacturers of nsn 4820012682274?

Curtiss-wright Flow Control (72352)

Does this nsn 4820012682274 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 4820012682274
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 4820012682274 contain any precious metals?
No precious metal content.

Does nsn 4820012682274 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 4820012682274?
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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