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 6620-01-076-8706
NSN 6110-01-645-8155
NSN 5985-01-427-3734
NSN 6110-00-959-9330
NSN 6645-01-426-8621
NSN 5996-00-716-4648
NSN 5996-00-800-7628
NSN 6110-01-346-5566
NSN 6130-00-161-7432
NSN 6150-01-400-1297
NSN 5960-01-375-6815
NSN 6240-01-137-6197