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 5910-01-574-0303
NSN 5935-01-036-9939
NSN 5990-01-182-5913
NSN 6620-00-533-0536
NSN 6110-01-386-8439
NSN 6610-01-156-0810
NSN 5855-00-973-5717
NSN 6240-00-905-0463
NSN 5930-01-241-9467
NSN 6320-01-347-2638
NSN 6645-01-086-4509
NSN 5925-00-423-2791