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 5925-00-009-9818
NSN 6620-01-038-7468
NSN 6610-01-461-8180
NSN 6105-00-867-6697
NSN 5920-01-098-6997
NSN 6105-00-197-2128
NSN 6240-00-715-5118
NSN 5920-01-487-5516
NSN 5996-01-106-2763
NSN 5998-01-507-4973
NSN 6150-00-570-0552
NSN 6145-01-432-0899