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Stop-check Valve

Model / MPN: 1421-0-3IN/142-0300/882039641 | NSN: 4820-01-010-1128
ITAR Registered seal

A valve with a bolt or stem that may be mechanically actuated to two different positions by rotary or linear motion. In the first position, the valve disk is located and locked against the seat permitting no fluid flow through the valve. In the second position, one side of the valve disk is located against the seat permitting movement of the disk in a manner that will allow a flow of fluid in one direction through the valve. The valve disk may be spring loaded. It may be inline or cartridge (manifold) design. See also valve (1), lift-check and valve (1), stop-lift-check.

Product Details
NATO Stock Number
Sold in multiples of
1 EA
Flow Control Device
Bonnet Type
Outside screw-yoke
Bonnet Attachment Method
Renewable Seat Ring Type
Bolt Hole Quantity
4 all ends
Maximum Operating Temp
775.0 degrees fahrenheit single response
Valve Operation Method
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Mounting Position
Maximum Operating Pressure
150.0 pounds per square inch single response
Outside Diameter
7.500 inches all ends
0.687 inches all ends
First Connection Face To Centerline Distance
4.750 inches
Bolt Hole Diameter
0.750 inches all ends
Second Connection Face To Centerline Distance
4.750 inches
Bolt Circle Diameter
6.000 inches all ends
Flange Face Design
Raised straight all ends
Raised Face Height
0.062 inches all ends
Raised Face Diameter
5.000 inches all ends
Steel body
Stainless steel stem
Steel flow control device
Steel seat
Material Specification
Astm a105, grade 2 assn standard single material response body
Material Specification
Mil-r-17131, mil-rcocr-a military specification single material response flow control device
Material Specification
Mil-r-17131, mil-rcocr-a military specification single material response seat
Media For Which Designed
Steam single response
Style Designator

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1421-0-3IN/142-0300/882039641 Cross Reference
  • MIL-V-22052
  • 153F-3-NR
  • MIL-V-22052
  • 153F-3-NR