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 5998-01-463-2714
NSN 6650-01-470-1315
NSN 6145-01-653-8083
NSN 5910-01-594-6577
NSN 5960-01-641-5493
NSN 5835-01-180-1400
NSN 6220-01-058-2780
NSN 5975-01-179-5359
NSN 5950-00-353-9564
NSN 5960-01-012-6765
NSN 5965-00-682-3567
NSN 5930-00-399-1048