Ventilation tools in different periods are related to the development of scientific and technological productivity. When modern industry begins to put the main force of ventilation on the ventilation butterfly valve, it can be found that the ventilation butterfly valve is indeed a good tool. Just as we have found the regular rules from different types and styles of ventilation butterfly valves, we can also find the practical application form of the whole ventilation butterfly valves from the course of ventilation.
When the manual ventilation butterfly valve is in full open position, the thickness of the manual ventilation butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has better flow control characteristics. Butterfly valve has elastic seal and metal seal. Elastic sealing valve, sealing ring can be embedded in the valve body or attached to the butterfly plate.