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 6150-01-251-2324
NSN 6320-00-731-6134
NSN 6320-01-567-9792
NSN 6685-00-203-2389
NSN 5905-01-450-9693
NSN 5985-00-978-0944
NSN 5895-01-386-8818
NSN 5950-00-125-2046
NSN 5990-01-171-9304
NSN 6135-00-050-7189
NSN 5835-00-827-1904
NSN 6240-01-646-0860