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 2925-01-491-3270
NSN 5985-00-112-0948
NSN 5925-00-432-0546
NSN 4140-01-434-2424
NSN 5915-01-528-9519
NSN 5920-01-449-7932
NSN 6110-00-263-6664
NSN 5999-01-332-6728
NSN 5950-01-204-1335
NSN 6685-01-419-4261
NSN 5935-01-555-6687
NSN 6135-00-170-8819