Pneumatic butterfly valve on the gas, liquid medium occasions we have discussed the use of more, and because the pneumatic valves used for solid materials (such as dust, powder) not, in the selection and use also there are many places worth exploring. Experience combined with the practical application of the following to talk about the see-zero.
Butterfly valve for the control of solid materials, often at the end of the tank as the discharge valve to use, such as cement cans, powder cans, etc. at the end of the tank to leak the news and quickly cut off. Because most of the dust materials containing large or small particles, the valve sealing surface on the wear and tear is not in doubt Selection properly, will greatly reduce the life of the valve, or valve leakage caused by very quickly, the impact of continued use. Such a case: there is a burden weighing system, the whole process of ingredients to achieve fully automatic with PLC control, and the ingredients of the discharge valve car uses three eccentric butterfly valve pneumatic, medium is a very fine powder particles. After a period of time with customers to reflect inside the drain valve, which often piles of powder to leak in the table. Detection valve is not leaking, but also reflects the previous customers of this valve is used, and the same medium, there is no such thing happened. In order to understand the whole story, the company sent to the scene, we have finally found the reason: the original, this medium is very small and a bit sticky, though the ingredients with a small vibration motor vehicles, the end of a number of materials attached to the tank wall and valve parts in the valve closed, stuck in the sealing surface around the valve can not be completely closed, with the result after re-installation of materials spill, with the passage of time, but also sealing surface wear very much, and even to show a trench.
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