A valve that controls flow by a circular disk, or a pair of semicircular disks, attached to a common spindle or lever turning on a diametral axis.
NSN 5935-00-019-0991
NSN 6220-01-219-1772
NSN 6110-00-942-1373
NSN 5985-00-221-5566
NSN 6320-01-276-4739
NSN 6105-00-957-9252
NSN 5975-01-206-4614
NSN 5920-01-552-4502
NSN 6105-00-120-9601
NSN 5910-00-456-0824
NSN 5990-01-386-5561
NSN 5895-01-389-3793