Insufficient water, or no water:
The axial flow pump may: blade wear, fracture or submerged depth is not enough, or the blade installation angle is too small and blades installed anti; rotating in the wrong direction, speed or did not meet the design requirements. The head is too high and the matching power shortage. Could be the cause of mixed flow pump: damage to the impeller; water inlet pipe in the air was not discharged, or a water inlet pipe and packing leakage; water pump does not turn, or low speed; ceiling lift too high or the total lift is too high, or valve, pipeline has obstacles blocking; supporting power shortage.
According to the reason that the water is insufficient or not, the water pump is processed. Such as impeller damage, the angle of the blade is small, impeller counter installed, the steering is not, speed is not enough, the pipeline obstacle, vacuum degree, lack of power and so on, according to the requirements to adjust and improve, so that the normal operation of the pump. If the system head is too high, we should first find out the device of the pipeline system, research to reduce the loss of head, so as to reduce the total head of the pump; secondly, the research can improve the pump speed or increase the blade installation angle. If the two can not be resolved, it is necessary to replace the pump or the use of water pumps in series approach.
