(1) the use of diaphragm before and after the action of the diaphragm and the pump head changes between the ball valve up and down movement to form a vacuum adsorption and push phenomenon to achieve the purpose of liquid delivery. â‘ When the diaphragm is pulled backwards, the outlet ball valve falls tightly close to the ball seat, the inlet ball valve rises upward due to the vacuum generated between the diaphragm and the pump head, and the liquid is sucked up. â‘¡ When the diaphragm is pushed forward, the inlet ball valve and the ball seat are airtight, so that the liquid will not pass, and the outlet is pushed forward by the diaphragm so that the ball valve is opened and the liquid is spit out. (2) From the above action principle, we can simply Know that the diaphragm, pump head, ball valve ball seat caused by any one factor leakage is unable to achieve the purpose of delivery, or abnormal flow, usually composed of four main failure: â‘ ball seat and ball valve can not be gas tight â‘¡ entrance , The export of foreign body obstruction â‘¢ membrane damage If the liquid delivery abnormalities, handling in this regard, should be resolved, and the factors that caused the above conditions, numerous, end to the then piping, parts and operating conditions can be judged.
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