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 6105-00-699-9186
NSN 6650-00-527-8822
NSN 5895-00-725-5264
NSN 6145-01-397-2892
NSN 6130-01-012-6562
NSN 6645-00-102-0015
NSN 6645-01-023-8020
NSN 5920-01-359-8720
NSN 5975-01-200-7710
NSN 6220-01-564-2531
NSN 5950-00-011-9729
NSN 5965-01-067-9280