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 6220-01-577-0041
NSN 5905-01-610-5940
NSN 6620-01-199-7570
NSN 5999-01-285-4230
NSN 6240-01-485-1136
NSN 6320-01-054-3046
NSN 6650-00-283-0978
NSN 5855-00-138-2386
NSN 5998-01-511-9792
NSN 6610-01-175-5920
NSN 6135-01-148-8531
NSN 5935-01-606-4798