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Safety Relief Valve

Model / MPN: 633XB-2-8-2 | NSN: 4820-00-289-4389
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
4820-00-289-4389
Sold in multiples of
1 EA
DEMIL
NO
Pipe Size Accommodated
0.375 inches 2nd end
Thread Class
3a 1st end
Thread Direction
Right-hand 2nd end
Thread Direction
Right-hand 1st end
Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Integral
Disk Loading Method
Spring
Maximum Operating Temp
180.0 degrees fahrenheit single response
Connection Style
G42 flared (tube) 1st end
Connection Style
G46b plain (pipe) 2nd end
Connection Style
Flared (tube) 1st end
Connection Style
Plain (pipe) 2nd end
Valve Operation Method
Automatic
Connection Type
Threaded external pipe 2nd end
Connection Type
Threaded external tube 1st end
Features Provided
Pressure tight outlet side
Thready Qty Per Inch (tpi)
16 1st end
Thready Qty Per Inch (tpi)
18 2nd end
Adjustable Pressure Range
+10.0/+50.0 pounds per square inch
Maximum Operating Pressure
450.0 pounds per square inch single response
Thread Size
0.375 inches 2nd end
Thread Size
0.750 inches 1st end
Seat Angle
45.0 degrees 1st end
Outside Diameter Tube Accommodated
0.500 inches 1st end
Material
Copper alloy seat
Material
Copper alloy body
Material
Stainless steel flow control device
Media For Which Designed
Water-oil-gas single response
Style Designator
Angle
Thread Series Designator
Anpt 2nd end
Thread Series Designator
Unf 1st end
633XB2 Series Parts

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633XB-2-8-2 Cross Reference
  • 633XB-2-8-2
  • 633-2-8
  • 633XB2-8-2
  • HL11251PC27