Handle flanged ventilation butterfly valve is made of steel plate welding, which has the characteristics of short structure size, light weight,convenient installation and so on. The valve has the advantages of small driving force moment, flexible opening and closing, and convenient operation. Oil seal ring is arranged on the valve body, there is no visible gap between the sealing pairs, and the leakage rate is small.
The expansion gap between the butterfly plate and the valve body is large, which can effectively prevent the phenomenon of jam caused by thermal expansion andcold contraction. This valve can be equipped with a variety of driving devices,such as manual device, worm gear transmission device, pneumatic device,electric device. Ventilation butterfly valves are widely used in metallurgy,chemical, electric power, building materials, mining and other industrial pipelines to control or regulate the medium gas.
Manual ventilation butterfly valve is a common device of dust collector equipment. The valve body and valve plate are welded with high quality carbon steel plate.Manual ventilation butterfly valve, also known as manual air door, flue air valve, round air valve and so on, is a sealed rotary valve. Manual ventilation butterfly valve is widely used, especially handle ventilation butterfly valve.It has the advantages of simple structure, small flow resistance, light weight,flexible rotation, long service life, convenient operation and maintenance. Itis a widely used environmental protection product.