An item consisting of a metal frame in which is inserted a flat metal plate mounted on a shaft. The plate, fluctuating automatically according to changes in atmospheric pressure, controls the stack or flue draft and maintains an absolute constancy of draft regardless of varying weather conditions.
NSN 5855-00-337-3679
NSN 6620-01-102-0008
NSN 5990-01-309-3740
NSN 6320-01-290-5271
NSN 4140-01-432-0292
NSN 5915-01-159-0811
NSN 6110-00-288-4179
NSN 5935-00-916-8027
NSN 5915-00-264-5657
NSN 5996-01-427-8435
NSN 6645-01-311-9004
NSN 5996-00-990-2192