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

Safety Relief Valve

Model / MPN: 5159A1-6TT135 | NSN: 4820-00-781-4834
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
4820-00-781-4834
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
Maximum Operating Temp
275.0 degrees fahrenheit single response
Connection Style
Flared (tube) 1st end
Valve Operation Method
Automatic
Connection Type
Threaded external tube 1st end
Connection Type
Threaded external tube 2nd end
Features Provided
Pressure tight outlet side
Thready Qty Per Inch (tpi)
18 1st end
Maximum Operating Pressure
2400.0 pounds per square inch single response
Thread Size
0.562 inches 1st end
Seat Angle
37.0 degrees 1st end
Opening Pressure Setting
135.0 pounds per square inch
Outside Diameter Tube Accommodated
0.375 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 t6 federal specification 1st material response body
Material Specification
Qq-a-225/6 t6 federal specification 1st material response flow control device
Material Specification
Qq-a-225/6 t6 federal specification 1st material response seat
Media For Which Designed
Ethylene glycol 3rd response
Media For Which Designed
Fuel/oil, hydrocarbon 5th response
Media For Which Designed
Helium 4th response
Media For Which Designed
Air 1st response
Media For Which Designed
Alcohol, ethyl 2nd response
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625, type 2 military specification single treatment response
Thread Series Designator
Unf 1st end
5159A1 Series Parts

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5159A1-6TT135 Cross Reference
  • C1498D6TT135