flanged ventilation butterfly valve

1. The ventilation butterfly valve has reasonable design, unique structure, light weight and quick opening and closing. 2. ventilation butterfly valve operating torque is small, easy to operate, labor-saving and dexterous. 3. Suitable materials are used to meet the requirements of low, medium and high medium temperature and corrosive medium. 4. There is no connecting rod, bolt, etc. inside, ventilation butterfly valve works reliably, has long service life and is not affected by the flow direction of medium