1) The inlet and outlet valves are closed or blocked, or the impeller flow passage is blocked.
2) Scale deposition and insufficient valve opening;
3) Low voltage
4) Impeller wear and flow head efficiency decrease.
There are three kinds of power loss: hydraulic loss, volume loss and mechanical loss.
Design the pump according to the working performance parameters of the pump,
The best performance is the rated performance parameter of water pump.
The frequency conversion range of the motor used on the water pump is 25-50Hz.
No, the explosion-proof motor is divided according to the working area of the motor. It's not about working underwater.
Bearing lubrication mainly includes grease lubrication and thin oil lubrication.