Safety Relief Valve NSN 4820-00-446-3543

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: 4820-00-446-3543

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Features and Characteristics

Pipe Size Accommodated

1.250 inches 1st end

Thread Direction

Right-hand 1st end

Flow Control Device

Disk

Bonnet Type

Inside spring

Bonnet Attachment Method

Threaded

Disk Loading Method

Spring

Bolt Hole Quantity

4 2nd end

Maximum Operating Temp

425.0 degrees fahrenheit single response

Connection Style

Plain, optional en (pipe) 1st end

Valve Operation Method

Automatic or manual

Flange Shape

Round with holes 2nd end

Connection Type

Threaded internal pipe 1st end

Valve Size

1.000 inches

Adjustable Pressure Range

+7.0/+25.0 pounds per square inch

Maximum Operating Pressure

100.0 pounds per square inch single response

Thread Size

1.250 inches 1st end

Outside Diameter

4.250 inches 2nd end

Thickness

0.438 inches 2nd end

First Connection Face To Centerline Distance

3.000 inches

Bolt Hole Diameter

0.562 inches 2nd end

Second Connection Face To Centerline Distance

1.906 inches

Bolt Circle Diameter

3.125 inches 2nd end

Flange Face Design

Plain 2nd end

Material

Nickel alloy flow control device

Media For Which Designed

Steam single response

Style Designator

Angle flanged ends

Thread Series Designator

Npt 1st end

FSC

4820 Nonpowered Valves

NIIN

004463543

NSN

4820004463543

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

1110323

Cage Code:

79500

Status:

MSDS:

Part Number:

26J535PC1T023

Cage Code:

79500

Status:

MSDS:

Part Number:

26J539PC52

Cage Code:

79500

Status:

MSDS:

Part Number:

26J610PC1T023

Cage Code:

79500

Status:

MSDS:

Part Number:

27J409PC1T023

Cage Code:

79500

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 4820-00-446-3543

What are the manufacturers of nsn 4820004463543?

Westinghouse Electric Corp (79500)
Westinghouse Electric Corp (11660)

Does this nsn 4820004463543 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 4820004463543
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 4820004463543 contain any precious metals?
Precious metal content is unknown.

Does nsn 4820004463543 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 4820004463543?
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
Quality Inspected Parts
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