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 6105-01-504-8764
NSN 4140-01-446-9512
NSN 6105-00-406-4930
NSN 5855-01-619-8314
NSN 6650-01-204-7430
NSN 5998-01-644-8097
NSN 6105-01-050-5878
NSN 6610-01-207-0045
NSN 6320-01-162-5977
NSN 6110-01-182-2911
NSN 5945-01-511-0749
NSN 6110-00-840-6560