Many slurry pump operators believe that the lower the pumping head, the smaller the motor power load.
Under this kind of misunderstanding, when purchasing a slurry pump, the head of slurry pump selected to be very high.
In fact, for a centrifugal slurry pump, when slurry pump is determined, its power consumption is proportional to the actual flow of the slurry pump.
The flow of the slurry pump will decrease with the increase of head. Therefore, the higher the head, the smaller the flow and the smaller the power consumption.
Conversely, the lower the head, the larger the flow, and the higher the power consumed.
Therefore, in order to prevent the motor from being overloaded, it is generally required that the actual pumping head of slurry pump should not be lower than 60% of the nominal pumping head.
Therefore, when high head is used for pumping slag with too low head, the motor is easy to overload and generate heat, and the motor can be burned in severe cases.
For emergency use, you must install a gate valve in the outlet pipe to adjust the output to reduce the flow and prevent the motor from overloading.
Pay attention to the temperature rise of motor. If it is found that the motor is overheated, the flow of the water outlet should be closed or shut down in time.
This is also easy to cause misunderstanding. Some operators believe that blocking the outlet and forcing a reduction in flow will increase the load on the motor.
In fact, the outlet pipe of a regular high-power centrifugal pump drainage and irrigation unit is equipped with a gate valve. In order to reduce the motor load at the start of the unit, the gate valve should be closed first, and the gate valve should be gradually opened after the motor starts.