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 5895-01-201-3254
NSN 5855-01-285-3483
NSN 6620-00-674-8390
NSN 6240-01-315-1984
NSN 6130-00-093-6051
NSN 5960-01-319-3932
NSN 5895-01-403-2793
NSN 5935-01-142-7301
NSN 5910-00-681-9754
NSN 7035-01-577-0003
NSN 5960-01-493-3948
NSN 6240-00-781-9899