Safety Relief Valve NSN 4820-00-041-2495

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: 4820-00-041-2495

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Features and Characteristics

Flow Control Device

Poppet

Bonnet Type

Exposed spring

Bonnet Attachment Method

Bolted

Disk Loading Method

Spring

Valve Discharge Flow Rate

282.0 pounds per hour

Bolt Hole Quantity

4 all ends

Maximum Operating Temp

850.0 degrees fahrenheit single response

Valve Operation Method

Manual

Flange Shape

Round with holes all ends

Connection Type

Flange all ends

Adjustable Pressure Range

+46.0 to 72.0 pounds per square inch

Maximum Operating Pressure

300.0 pounds per square inch single response

Opening Pressure Setting

72.0 pounds per square inch

Outside Diameter

3.750 inches all ends

Thickness

0.562 inches all ends

Bolt Hole Diameter

0.625 inches all ends

Bolt Circle Diameter

2.625 inches all ends

Flange Face Design

Raised straight all ends

Raised Face Height

0.062 inches all ends

Raised Face Diameter

1.375 inches all ends

Material

Steel seat

Material Specification

Fedstd66, aisi416/sae51416 federal standard single material response stem

Media For Which Designed

Steam single response

Style Designator

Angle

Test Data Document

81349-mil-s-901 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).

Nondefinitive Specification/std Data

2 type and d composition and 0.500 size

FSC

4820 Nonpowered Valves

NIIN

000412495

NSN

4820000412495

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

MILV20065

Cage Code:

81349

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 4820-00-041-2495

What are the manufacturers of nsn 4820000412495?

Military Specifications (81349)

Does this nsn 4820000412495 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 4820000412495
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 4820000412495 contain any precious metals?
No precious metal content.

Does nsn 4820000412495 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 4820000412495?
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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