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Safety Relief Valve

Model / MPN: 645B-4-12-2 | NSN: 4820-00-942-9134
ITAR Registered seal

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.

Product Details
NATO Stock Number
4820-00-942-9134
Sold in multiples of
DEMIL
NO
Thread Direction
Right-hand 1st end
Disk Loading Method
Spring
Maximum Operating Temp
-65.0 degrees fahrenheit 1st response
Maximum Operating Temp
225.0 degrees fahrenheit 2nd response
Connection Type
Threaded internal tube 1st end
Features Provided
Pressure tight outlet side
Thready Qty Per Inch (tpi)
12 1st end
Maximum Operating Pressure
200.0 pounds per square inch single response
Thread Size
1.500 inches 1st end
Opening Pressure Setting
200.0 pounds per square inch
Outside Diameter Tube Accommodated
0.750 inches 1st end
Material
Stainless steel body
Material
Stainless steel seat
Media For Which Designed
Fuel/oil, hydrocarbon single response
Style Designator
Angle
Thread Series Designator
Un 1st end
645B4 Series Parts

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645B-4-12-2 Cross Reference
  • 645B4-12-2