A valve with a stem that may be mechanically actuated to three 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. In the third 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, lift-check and valve, stop-check.
NSN 5925-01-521-2940
NSN 5990-00-777-0413
NSN 6220-01-211-8419
NSN 5996-01-358-3482
NSN 5910-01-227-8221
NSN 6240-01-446-7851
NSN 5915-00-660-9207
NSN 5960-00-159-7309
NSN 5965-01-204-8505
NSN 6620-00-906-1726
NSN 5965-01-558-7385
NSN 5915-00-205-2615