Model: 252681

Safety Relief Valve

Properties:

Thread Class

3b 1st end

Thread Direction

Right-hand 1st end

Flow Control Device

Poppet

Bonnet Type

Inside spring

Bonnet Attachment Method

Threaded

Disk Loading Method

Spring

Valve Discharge Flow Rate

85.0 gallons per minute

Maximum Operating Temp

160.0 degrees fahrenheit single response

Connection Style

G4 gasket sea (boss) 1st end

Connection Style

Gasket sea (boss) 1st end

Valve Operation Method

Automatic

Connection Type

Threaded internal boss 1st end

Thready Qty Per Inch (tpi)

18 1st end

Maximum Operating Pressure

150.0 pounds per square inch single response

Thread Size

0.562 inches 1st end

Outside Diameter Tube Accommodated

0.375 inches 1st end

Material

Aluminum alloy

Media For Which Designed

Oil, hydraulic single response

Special Test Features

Vibration frequency range shall be 5 to 500 hz

Style Designator

Angle

Test Data Document

81349-mil-std-202d standard (includes industry or association standards, individual manufactureer standards, etc.).

Thread Series Designator

Unjf 1st end

NSN

4820-00-421-5935

Part Number

252681

Description

Valve,safety Relief

CAGE

82577

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 252681 NSN 4820-00-421-5935

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

127220

UFC:

64490

LTL:

77.5

LCL:

77.5

WCC:

594

TCC:

SHC:

ACC:

Trailers/Vehicles

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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