A valve with a stem that may be mechanically actuated to two different positions by rotary or linear motion. In the first 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. In the second position, the valve disk is lifted from the seat to allow a flow of fluid in either direction through the valve. The valve disk may be spring loaded. See also valve, stop-check and valve, stop-lift-check.
Classification: Check valves of materials other than copper, iron or steel
NSN 5935-00-647-4020
NSN 6150-00-485-8853
NSN 6620-00-593-5313
NSN 5920-01-252-3092
NSN 6130-01-417-1518
NSN 5975-01-613-7804
NSN 5915-00-994-0541
NSN 2925-00-774-8247
NSN 5990-00-870-8310
NSN 5975-01-424-4639
NSN 5915-00-968-7515
NSN 6320-01-453-2358