air duct valves

1.Air Duct Valves is made of steel plate welding, which has the characteristics of short structure size, light weight and convenient installation. 2.Air Duct Valves has small driving torque, flexible opening and closing, and convenient operation. There is no visible gap between the sealing pairs and the leakage rate is small. The expansion gap between butterfly plate and valve body is large, which can effectively prevent the jamming caused by heat expansion and cold contraction