Q: pneumatic butterfly valve in the application of powder system a: butterfly valve stem for solid materials, often in the tank bottom to use as a feeding valve, such as sensitive clay POTS, stone powder tank bottom, such as Marine valve used for feeding and quickly truncation. In such a system, there are other needs to think problems to factors, such as: no can make material from above on the car directly rushed to the valve on the valve plate ( This kind of impact will be to close the valve can not be strictly) And the static pressure of the material must be no more than the preset bearing pressure pneumatic butterfly valve, and so on. There is a case example: there is a mixture of raw materials weighing system, whole process raw material mixture with PLC to achieve full semi-automatic stem, and the mixed material trolley feeding valve selection is butterfly valve, pneumatic air justice medium is fine powder particles. After find out comprised, propose solutions: in PLC procedure, have extended their motor oscillation, trying to close the valve after the material all shake out; Will be weighing device zero point adjustment, will be exposed to material it until it is all to zero, at this time to close valve by PLC sends out signals; Will sometimes justice butterfly valve change as elastic double injustice hard sealing butterfly valve (closely Also can use the midline tightly closed rubber butterfly Industrial Valves, thinking problem to occasionally have large particles in the material, rubber tightly closed may not be easy to use bad - — If no particles of dust, can consider problems with soft tight sealing butterfly valve) , due to the air fair butterfly valve seat is an oblique tightly closed surface, surface is tightly closed, so the material is easy to accumulate in the tightly closed surface, can't discharge quickly, butterfly Industrial Valves and single or double unfair injustice, there is no evil, even a little tightly closed surface material, also was scraped the valve plate in the valve is closed, so to ensure satisfactory tightly closed, and tightly closed surface durable not easy to bad. Through such a transformation, so the problem has never happened. Return valve factory testing is no leakage, and reflect the customer was using the valve, and the same medium, there have been no such a thing. By using period, the customer reflect the valve leakage, so that powder piles often leaks on the office table. To find out someone who companies send someone up to present, finally find out comprised: it turns out that this kind of medium and fine, and some sticky, although mixed material car actors dress up oscillating motor, there will come a lot of material attached in the tank wall and parts of the valve, the valve closing, stuck in a tightly closed surface is enclosed, to close the valve can not be absolutely, so that the new after adding material leakage occurs, over time, also make tightly closed surface abrasion is very hot, even in groove. Stem the difference between ordinary manual valves and valve is that you can't treat it as an isolated components to, and be sure to take it as a whole automatic control system of a small group to think about the problem, curb the valve using a lot of problems, is not of type selection and layout of the equipped with problem, but because users of valve stem consciousness is not enough so that the valve stem to stem system adjustment, appropriate is good. , as long as there is aware of the key place of the valve accurately selection, and adjustment stage to curb the valve in the system to adjust, can greatly detract from failure rate, make the automatic control system safe operation for a long period of time. 。 Because most of materials including or big or small particles of dust, the valve tightly closed surface abrasion is beyond doubt, improper selection, will greatly reduce the use fixed number of year of the survival of the valve, or quickly lead to valve leakage, affect the use. Notes to the order: The national standard) A, A: B: product name, model, nominal size medium and temperature, pressure range C: whether there is attachment, delivery time, and special requirements so that we can correct selection for you. Second, if the valve has been selected by design unit of our company model, please order according to the valves parameters directly with our sales center. Three, it is very important when you use the occasion or the environment is more complex, would you please provide design drawings and detailed parameters, our engineers experts will concentrate on review and analysis for you. We can provide you with professional solutions, including design, customization, complete, operation and service. We've been working on the valve leader in the field of industry, to provide you with the latest knowledge of the valve, the best service, best technical adviser. 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