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

Safety Relief Valve

Model / MPN: 16977-F | NSN: 4820-01-259-2210
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
4820-01-259-2210
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
4 all ends
Maximum Operating Temp
450.0 degrees fahrenheit 2nd response
Maximum Operating Temp
75.0 degrees fahrenheit 1st response
Valve Operation Method
Automatic
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Valve Size
1.500 inches
Adjustable Pressure Range
+46.0/+50.0 pounds per square inch
Opening Pressure Setting
50.0 pounds per square inch
Outside Diameter
5.000 inches all ends
Thickness
0.562 inches all ends
First Connection Face To Centerline Distance
4.875 inches
Bolt Hole Diameter
0.625 inches all ends
Second Connection Face To Centerline Distance
5.125 inches
Bolt Circle Diameter
3.875 inches all ends
Flange Face Design
Raised straight all ends
Raised Face Height
0.688 inches all ends
Raised Face Diameter
2.875 inches all ends
Material
Steel body
Material
Steel comp 316 packing
Material
Stainless steel flow control device
Material
Stainless steel seat
Material
Stainless steel stem
Media For Which Designed
Fuel/oil, hydrocarbon single response
16977 Series Parts

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16977-F Cross Reference
  • 16977-F 1 1-2 H 3
  • 26HB10L-120