5 Check the leakage of the shaft seal. The operation of the centrifugal pump can be divided into three steps, namely start, run and stop. After the above preparations are completed, the motor can be started. 2 The bearing is filled with oil, the oil level is normal, and the oil quality is qualified. 6 The direction of motor rotation is correct. 3 Open all the inlet 4" Submersible Borehole Pumps valves of the centrifugal pump.

Note that the idle time of closing the valve should not exceed 3 minutes. After everything is normal, gradually open the outlet valve and adjust it to the required working conditions. After the speed is normal, the outlet valve can be gradually opened and adjusted to the required working conditions. After the speed is normal, check the pressure and current and pay attention to whether there is vibration and noise.. Start: The following preparations should be made before starting: 1

Check the integrity of the pump equipment.First, open all the inlet valves, close the outlet valve, and start the motor. 4 Except for water injection into the pump or water diversion of the vacuum pump, open the air release valve to exhaust. A little dripping water is appropriate for the packing seal

This adjustment method can keep the pipeline characteristic curve unchanged.　　2. When the centrifugal pump is working on the designated pipeline, due to changes in production tasks, the working flow of the pump does not match the production requirements; or when the selected centrifugal pump is running in a particular pipeline, The flow rate provided does not necessarily meet the requirements of the delivery task. The original speed of the pump is n and the working point is M.. The flow rate decreases as the speed decreases, and the power consumption also decreases accordingly, so it is more reasonable from the perspective of energy consumption.　　1. Changing the opening of the valve