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 5998-01-146-5780
NSN 5935-01-114-8273
NSN 5930-01-520-3217
NSN 6610-01-050-3075
NSN 6650-01-412-4217
NSN 5925-00-081-9135
NSN 5985-00-951-9126
NSN 4140-01-145-2797
NSN 6610-00-435-8370
NSN 6135-01-294-0370
NSN 5990-00-434-0620
NSN 6105-00-549-2668