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 4140-01-152-4199
NSN 5855-00-560-0110
NSN 5985-01-541-1846
NSN 5960-00-018-1302
NSN 5950-01-145-5529
NSN 6650-01-147-3125
NSN 5996-01-121-8430
NSN 6650-01-547-4342
NSN 5905-01-183-9947
NSN 5975-00-058-1418
NSN 5895-01-364-0968
NSN 6220-01-158-6556