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 5855-01-128-1762
NSN 5985-01-278-0493
NSN 5960-01-064-0319
NSN 5905-00-753-9731
NSN 6145-00-308-7189
NSN 5930-01-511-0586
NSN 5835-00-707-6266
NSN 6130-00-737-0459
NSN 5996-00-861-9692
NSN 5975-01-441-7561
NSN 5920-01-113-7263
NSN 5855-00-014-5008