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Safety Relief Valve

Model / MPN: C225-4 | NSN: 4820-00-104-8746
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
4820-00-104-8746
Sold in multiples of
DEMIL
NO
Thread Class
3a 1st end
Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Disk Loading Method
Spring
Valve Discharge Flow Rate
1.0 cubic feet per minute
Maximum Operating Temp
300.0 degrees fahrenheit 2nd response
Maximum Operating Temp
300.0 degrees fahrenheit 3rd response
Maximum Operating Temp
300.0 degrees fahrenheit 1st response
Connection Style
External seat for gasket seal (boss) 1st end
Valve Operation Method
Automatic
Connection Type
Threaded external boss 1st end
Maximum Operating Pressure
200.0 pounds per square inch 1st response
Maximum Operating Pressure
200.0 pounds per square inch 2nd response
Maximum Operating Pressure
200.0 pounds per square inch 3rd response
Thread Size
0.437 inches 1st end
Opening Pressure Setting
7.0 pounds per square inch
Outside Diameter Tube Accommodated
0.250 inches 1st end
Material
Aluminum alloy 2024 body
Material
Aluminum alloy 2024 flow control device and rubber butadiene-acrylonitrile class nbr flow control device
Material
Aluminum alloy 2024 seat
Material
Aluminum alloy 2024 and rubber butadiene-acrylonitrile class nbr flow control device
Material Specification
Qq-a-225/6 federal specification single material response flow control device and mil-r-7362, type 2 federal specification 1st material response flow control device
Material Specification
Qq-a-225/6 federal specification single material response body
Material Specification
Qq-a-225/6 federal specification single material response seat
Material Specification
Qq-a-225/6 federal specification single material response and mil-r-7362, type 2 federal specification 1st material response flow control device
Media For Which Designed
Nitrogen, gaseous 2nd response
Media For Which Designed
Oil 3rd response
Media For Which Designed
Air 1st response
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625, type 2 military specification single treatment response
Style Designator
Straight through w/baffle
Thread Series Designator
Unf 1st end
C225 Series Parts

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C225-4 Cross Reference
  • D516A6D7