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Safety Relief Valve

Model / MPN: 1975C | NSN: 4820-00-843-5743
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
4820-00-843-5743
Sold in multiples of
DEMIL
NO
Pipe Size Accommodated
0.750 inches 2nd end
Pipe Size Accommodated
1.000 inches 1st end
Thread Direction
Right-hand 2nd end
Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Bonnet Type
Inside spring
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Valve Discharge Flow Rate
270.0 pounds per hour
Connection Style
G46b plain (pipe) 2nd end
Connection Style
G9 plain, optional en (pipe) 1st end
Valve Operation Method
Automatic
Connection Type
Threaded external pipe 2nd end
Connection Type
Threaded internal pipe 1st end
Features Provided
Bonnet packing and pressure tight outlet side
Thready Qty Per Inch (tpi)
11-1/2 1st end
Thready Qty Per Inch (tpi)
14 2nd end
Maximum Operating Pressure
2000.0 pounds per square inch single response
Thread Size
0.750 inches 2nd end
Thread Size
1.000 inches 1st end
Opening Pressure Setting
110.0 pounds per square inch
Material
Stainless steel
Media For Which Designed
Steam single response
Thread Series Designator
Npt 2nd end
Thread Series Designator
Npt 1st end
Reference Number Differentiating Characteristics
As differentiatedby valve size and set pressure
1975C Series Parts

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1975C Cross Reference