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 5895-01-231-9895
NSN 6220-01-545-3562
NSN 6645-01-629-6343
NSN 5999-01-229-0504
NSN 6650-01-363-9608
NSN 6105-01-207-2729
NSN 6320-01-335-8336
NSN 5910-01-132-3245
NSN 7035-01-040-6373
NSN 6135-01-238-2878
NSN 5925-01-116-8225
NSN 4140-01-267-0135