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 5950-01-111-9085
NSN 5935-01-634-0668
NSN 5996-00-508-0383
NSN 5935-00-209-0397
NSN 6150-01-431-8617
NSN 5998-00-079-8822
NSN 4140-01-365-9113
NSN 6620-00-992-5876
NSN 5996-00-895-3956
NSN 5895-01-371-4177
NSN 6610-00-179-9035
NSN 5835-01-104-8914