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 6220-01-375-3801
NSN 2925-01-146-0278
NSN 6130-00-957-4815
NSN 5990-00-864-5207
NSN 5855-01-180-2172
NSN 6240-01-091-8029
NSN 5999-01-330-6930
NSN 6105-01-424-6439
NSN 6110-01-227-6851
NSN 6110-01-244-4986
NSN 6650-00-000-0164
NSN 5975-01-342-8961