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 2925-00-918-0859
NSN 5985-00-080-1382
NSN 5999-00-871-2976
NSN 5965-00-866-3371
NSN 6610-01-307-6363
NSN 5855-01-384-4914
NSN 6220-01-433-7039
NSN 6220-01-419-1008
NSN 7035-00-585-2113
NSN 5950-00-359-7801
NSN 5998-00-121-8011
NSN 6650-01-014-5990