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

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.:
1
App. Key:
AP
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

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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

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