Safety Relief Valve NSN 4820-01-121-8056

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: 4820-01-121-8056

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Features and Characteristics

Thread Direction

Right-hand 1st end

Flow Control Device

Disk

Bonnet Type

Inside spring

Bonnet Attachment Method

Bolted

Disk Loading Method

Spring

Bolt Hole Quantity

4 2nd end

Maximum Operating Temp

450.0 degrees fahrenheit single response

End Application

Used on condensate tank onboard 270 ft wmec cg vessels

Connection Style

Plain, optional en (pipe) 1st end

Valve Operation Method

Automatic

Flange Shape

Round with holes 2nd end

Connection Type

Threaded internal pipe 1st end

Valve Size

4.000 inches

Maximum Operating Pressure

30.0 pounds per square inch single response

Thread Size

4.000 inches 1st end

Outside Diameter

7.000 inches 2nd end

Thickness

0.687 inches 2nd end

First Connection Face To Centerline Distance

5.250 inches

Bolt Hole Diameter

0.625 inches 2nd end

Second Connection Face To Centerline Distance

5.500 inches

Bolt Circle Diameter

5.875 inches 2nd end

Flange Face Design

Raised straight 2nd end

Raised Face Height

0.062 inches 2nd end

Raised Face Diameter

4.687 inches 2nd end

Material

Iron cast body

Style Designator

Angle flanged ends

Thread Series Designator

Npt 1st end

FSC

4820 Nonpowered Valves

NIIN

011218056

NSN

4820011218056

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

1511-L

Cage Code:

16497

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 4820-01-121-8056

What are the manufacturers of nsn 4820011218056?

Dresser, Inc. (16497)

Does this nsn 4820011218056 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 4820011218056
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 4820011218056 contain any precious metals?
No precious metal content.

Does nsn 4820011218056 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 4820011218056?
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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