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 5985-01-539-5560
NSN 5998-01-650-6929
NSN 5920-01-374-2093
NSN 4140-00-200-9082
NSN 5905-01-414-1119
NSN 6620-01-391-7331
NSN 5985-01-113-1376
NSN 5999-01-120-8865
NSN 5998-00-525-2654
NSN 6135-01-026-9960
NSN 5905-01-430-7231
NSN 6240-01-555-4832