1 type is normally closed
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 5905-01-347-5066
NSN 5990-01-426-7350
NSN 5915-01-187-5755
NSN 6645-01-024-8199
NSN 5945-00-982-6880
NSN 6130-01-340-7846
NSN 6110-01-468-5955
NSN 5930-01-414-8703
NSN 5985-01-262-9103
NSN 5915-01-446-5028
NSN 5999-01-539-5632
NSN 5985-01-461-7717