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 6145-01-587-1707
NSN 5895-00-082-3925
NSN 2925-00-221-4977
NSN 6645-00-922-8312
NSN 5998-00-189-0350
NSN 5910-00-615-9975
NSN 6150-01-363-3629
NSN 6135-00-835-7211
NSN 5910-01-358-9922
NSN 6610-00-205-7352
NSN 5910-01-467-0108
NSN 6105-00-194-6583