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

Safety Relief Valve

Model / MPN: 8171A | NSN: 4820-00-875-1574
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
4820-00-875-1574
Sold in multiples of
1 EA
DEMIL
NO
Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Bolted
Disk Loading Method
Spring
Bolt Hole Quantity
12 2nd end
Bolt Hole Quantity
14 1st end
Maximum Operating Temp
650.0 degrees fahrenheit single response
Valve Operation Method
Automatic
Flange Shape
Round with holes 1st end
Flange Shape
Round with holes 2nd end
Connection Type
Flange 2nd end
Connection Type
Flange 1st end
Mounting Facility
Bracket
Valve Size
8.000 inches
Maximum Operating Pressure
50.0 pounds per square inch single response
Outside Diameter
12.500 inches 2nd end
Outside Diameter
12.750 inches 1st end
Thickness
0.812 inches 1st end
Thickness
1.437 inches 2nd end
First Connection Face To Centerline Distance
9.187 inches
Bolt Hole Diameter
0.687 inches 1st end
Bolt Hole Diameter
0.875 inches 2nd end
Second Connection Face To Centerline Distance
10.000 inches
Bolt Circle Diameter
11.062 inches 1st end
Bolt Circle Diameter
10.625 inches 2nd end
Flange Face Design
Plain 1st end
Material
Steel body
Material
Steel comp 303 flow control device
Material
Steel comp 416 packing
Material
Steel comp 416 stem
8171A Series Parts

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8171A Cross Reference