Safety Relief Valve NSN 4820-01-551-1121

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: 4820-01-551-1121

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Features and Characteristics

Thread Direction

Right-hand 1st end

Flow Control Device

Poppet

Disk Loading Method

Spring

Maximum Operating Temp

275.0 degrees fahrenheit single response

Minimum Operating Temp

-40.0 degrees fahrenheit

End Application

New construction lhd8

Connection Style

G46b plain (pipe) 1st end

Valve Operation Method

Automatic

Connection Type

Threaded external pipe 1st end

Adjustable Pressure Range

+5.6/+13.9 pounds per square inch

Maximum Operating Pressure

200.0 pounds per square inch single response

Thread Size

0.250 inches 1st end

Opening Pressure Setting

8.0 pounds per square inch

Part Name Assigned By Controlling Agency

Adjustable popoff relief valve

Special Features

Adjustable poppet valve, zero leakage, out to atmoshere; temperature range determined my seal material

Material

Copper alloy body

Media For Which Designed

Air single response

Style Designator

Err-090

Thread Series Designator

Npt 1st end

Furnished Items And Quantity

1 deflector cap

FSC

4820 Nonpowered Valves

NIIN

015511121

NSN

4820015511121

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

D559B-2M-D-8

Cage Code:

91816

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 4820-01-551-1121

What are the manufacturers of nsn 4820015511121?

Circor Aerospace, Inc. (91816)

Does this nsn 4820015511121 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 4820015511121
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 4820015511121 contain any precious metals?
No precious metal content.

Does nsn 4820015511121 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 4820015511121?
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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