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Worldwide distributor of NSN parts and consumables located in the USA.

Safety Relief Valve

Model / MPN: D559A-2M-5 | NSN: 4820-00-706-4591
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
4820-00-706-4591
Sold in multiples of
1 EA
DEMIL
NO
Pipe Size Accommodated
0.250 inches 1st end
Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Disk Loading Method
Spring
Maximum Operating Temp
250.0 degrees fahrenheit single response
Connection Style
G46b plain (pipe) 1st end
Connection Style
Plain (pipe) 1st end
Valve Operation Method
Automatic
Connection Type
Threaded external pipe 1st end
Features Provided
Pressure tight outlet side
Thready Qty Per Inch (tpi)
18 1st end
Maximum Operating Pressure
200.0 pounds per square inch single response
Thread Size
0.250 inches 1st end
Opening Pressure Setting
5.0 pounds per square inch
Material
Steel comp 303 body
Material
Steel comp 303 flow control device
Material
Steel comp 303 seat
Material Specification
Aisi 3031/sae 30303 assn standard single material response
Media For Which Designed
Ammonia, liquid 1st response
Media For Which Designed
Butane 2nd response
Media For Which Designed
Fuel/oil, hydrocarbon 3rd response
Media For Which Designed
Gas, inert 4th response
Media For Which Designed
Hydrogen 5th response
Style Designator
Straight through w/baffle
Thread Series Designator
Npt 1st end
D559A Series Parts

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D559A-2M-5 Cross Reference
  • D539A2M5
  • C1058A2D5