(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 of the factors that leakage can not achieve the purpose of delivery, or abnormal flow, usually resulting from the failure of four main students:
Ball seat and the ball valve can not be airtight â‘¡ entrance, exit foreign body obstruction â‘¢ membrane damage If the liquid delivery abnormalities, to deal with this area, should be resolved, and the factors that caused the above conditions, numerous, end as the then Piping, fittings and operating conditions can be judged.

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