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Safety Relief Valve

Model / MPN: 559A-1M-25 | NSN: 4820-00-054-7713
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
4820-00-054-7713
Sold in multiples of
1 EA
DEMIL
NO
Pipe Size Accommodated
0.125 inches 1st end
Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Disk Loading Method
Spring
Maximum Operating Temp
-40.0 degrees fahrenheit 1st response
Maximum Operating Temp
250.0 degrees fahrenheit 2nd response
Connection Style
G46b plain (pipe) 1st end
Connection Style
Plain (pipe) 1st end
Valve Operation Method
Automatic or manual
Connection Type
Threaded external pipe 1st end
Adjustable Pressure Range
+29.0/+72.0 pounds per square inch
Maximum Operating Pressure
200.0 pounds per square inch single response
Thread Size
0.125 inches 1st end
Opening Pressure Setting
25.0 pounds per square inch
Material
Aluminum alloy body
Material
Aluminum alloy flow control device and rubber butadiene-acrylonitrile class nbr flow control device
Material
Aluminum alloy seat
Material
Aluminum alloy stem
Media For Which Designed
Refrigerant 12 4th response
Media For Which Designed
Acetylene 1st response
Media For Which Designed
Air 2nd response
Media For Which Designed
Hydrogen 3rd response
Surface Treatment
Anodize
Style Designator
Straight through note: to be used for valve bodies of one section only.
Thread Series Designator
Npt 1st end
559A Series Parts
Solicitations
Solicitation Description Qty UOM Close Date
SPE7M115TQ743 Valve, Safety Relief 72 EA 06/18/2015

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559A-1M-25 Cross Reference
  • Z40-0001-000