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 5930-01-222-2232
NSN 5990-01-229-8567
NSN 5950-01-512-1465
NSN 7035-01-106-3476
NSN 6320-01-415-0953
NSN 5855-01-366-2429
NSN 6135-01-054-2462
NSN 6130-01-388-2561
NSN 6135-01-629-0198
NSN 5905-01-460-7525
NSN 5930-01-248-0111
NSN 5930-01-220-1990