Model: 641B-3-1/2-2

Safety Relief Valve

Properties:

Thread Direction

Right-hand 2nd end

Thread Direction

Right-hand 1st end

Connection Style

G46b plain (pipe) 2nd end

Connection Style

G9 plain, optional en (pipe) 1st end

Valve Operation Method

Automatic

Connection Type

Threaded external pipe 2nd end

Connection Type

Threaded internal pipe 1st end

Maximum Operating Pressure

125.0 pounds per square inch single response

Thread Size

0.500 inches 1st end

Thread Size

0.500 inches 2nd end

Material

Rubber butadiene-acrylonitrile class nbr packing

Material

Steel comp 303 body

Thread Series Designator

Npt 2nd end

Thread Series Designator

Npt 1st end

NSN

4820-01-574-7527

Part Number

641B-3-1/2-2

Description

Valve,safety Relief

CAGE

18565

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.

Part 641B-3-1/2-2 NSN 4820-01-574-7527

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05488

FIIG:

A046B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

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Schedule B and Export

Schedule B: 8481400000
SITC: 74740
End Use: Industrial machines, other
NAICS: 332911
USDA: 1

Freight Class: Safety or relief valves