Model: 667977

Safety Relief Valve

Properties:

Thread Class
3b all ends
Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Disk Loading Method
Spring
Valve Discharge Flow Rate
8.0 gallons per minute
Renewable Seat Ring Type
Pressed-in
Maximum Operating Temp
-65.0 degrees fahrenheit 1st response
Maximum Operating Temp
160.0 degrees fahrenheit 2nd response
Valve Operation Method
Automatic
Connection Type
Threaded internal tube all ends
Features Provided
Valve stem lock shield and pressure tight outlet side
Thready Qty Per Inch (tpi)
16 all ends
Thread Size
0.750 inches all ends
Opening Pressure Setting
850.0 pounds per square inch
Outside Diameter Tube Accommodated
0.500 inches all ends
Media For Which Designed
Hydraulic fluid, mineral base single response
Thread Series Designator
Unf all ends
NSN
4820-00-697-3733
Part Number
667977
Description
Valve,safety Relief
CAGE
98897

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 667977 NSN 4820-00-697-3733

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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