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 4140-00-218-3579
NSN 5996-00-064-7228
NSN 5998-01-605-1982
NSN 6620-00-915-0868
NSN 6220-01-184-0228
NSN 6320-00-593-0379
NSN 5910-01-354-1593
NSN 6150-00-735-1276
NSN 5985-01-203-8053
NSN 6105-01-360-1540
NSN 5999-01-261-2266
NSN 4140-01-600-4394