First of all to introduce the cause of the pump reversal phenomenon. When there are several pumps running in parallel or a pump running alone, if the pump suddenly stop rotating, pump outlet valve is not strict, pump reversal phenomenon will be very easy to appear, when there is a reversal of the fault, is not able to start, otherwise it will be very easy to shaft and motor damage, so, when this happens, Be sure to keep the pump exit valve off immediately and start the standby pump.

Here is the introduction of the pump reverse will bring harm. When the pump appears inverted phenomenon, its export mother tube pressure may be a sharp decline in the situation, in addition, may also cause the impeller loose, so that the static and dynamic parts of the pump friction, resulting in the damage of related components, the impact of the overall operation of the pump, and even bring security risks. In addition, when the pump appears to reverse the problem, its head will be very low, serious time will not be able to hit the water.