Model: 665-4-4SS27

Safety Relief Valve

Properties:

Thread Class

3b all ends

Thread Direction

Right-hand all ends

Flow Control Device

Poppet

Bonnet Type

Inside screw

Bonnet Attachment Method

Integral

Disk Loading Method

Spring

Valve Discharge Flow Rate

4.0 gallons per minute

Maximum Operating Temp

250.0 degrees fahrenheit single response

Connection Style

G4 gasket sea (boss) all ends

Connection Style

Gasket sea (boss) all ends

Valve Operation Method

Automatic

Connection Type

Threaded internal boss all ends

Features Provided

Pressure tight outlet side

Maximum Operating Pressure

250.0 pounds per square inch single response

Thread Size

0.437 inches all ends

Opening Pressure Setting

200.0 pounds per square inch

Outside Diameter Tube Accommodated

0.250 inches all ends

Material

Steel comp 303

Material Specification

66 federal standard single material response

Media For Which Designed

Fuel/oil, hydrocarbon single response

Surface Treatment

Passivate

Thread Series Designator

Unjf all ends

NSN

4820-00-403-4692

Part Number

665-4-4SS27

Description

Valve,safety Relief

CAGE

09990

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 665-4-4SS27 NSN 4820-00-403-4692

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