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 6105-00-105-9187
NSN 7035-00-312-3055
NSN 5835-01-604-2279
NSN 5960-01-412-0619
NSN 6620-00-684-3425
NSN 5990-01-108-7785
NSN 5960-00-826-7697
NSN 5996-00-369-5299
NSN 5998-00-596-9568
NSN 6650-01-495-0995
NSN 6145-01-064-1665
NSN 5905-01-608-7618