Butterfly valve is used for solid materials control, often is in the tank bottom to use as a feeding valve, such as cement tank, such as the powder tank bottom, used for feeding and quickly cut off. Because most of dust material contains big or small particles, the valve sealing surface wear is beyond doubt, improper selection, will greatly reduce the service life of the valve, or soon due to valve leakage, continue to use. Ingredients weighing system, the entire process of ingredients with PLC to realize automatic control, and the ingredients of trolley feeding valve selection is pneumatic triple eccentric butterfly valve, medium is a very fine powder particles. Use after a period of time, the valve leakage, the stone piles to leak on the workbench, often because of the media is very thin, and a bit of a sticky, although ingredients on the car is equipped with vibration motor, there many parts are attached to the tank wall and the material valve, the valve is closed, the card around the sealing surface, make the valve cannot be completely shut down, causing to add material leakage, over time, also make the sealing surface of wear, and even in groove.
