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 5935-01-423-1324
NSN 5975-01-036-6010
NSN 6130-01-497-2117
NSN 6220-01-146-4469
NSN 7035-00-001-4586
NSN 6135-01-461-2915
NSN 6645-01-153-2090
NSN 5965-00-275-0491
NSN 5950-01-365-7399
NSN 6320-01-388-3125
NSN 5990-01-288-7393
NSN 5925-00-557-4530