Starting a centrifugal pump

I. Before startup: 1. Check whether the process is correct. 2. Is the area around the pump clean, with no items that could interfere with its operation? 3. Check whether the screws of the coupling guard, footings, and other components are tightened properly, and look for any signs of looseness. 4. The bearing housing must have sufficient lubricating oil, and the oil level should be maintained within the specified range, at 1/2 to 2/3 of the capacity. 5. Select an appropriate pressure gauge based on the pump’s purpose and operating conditions. 6. The pump should be supplied with cooling water, and the water flow must be unobstructed. 7. Check whether the voltage is within the specified range, and verify that the motor’s wiring and grounding are in good condition. II. Starting the pump: 1. Open the inlet valve of the pump. 2. Open the pump’s vent valve to release the gas inside the pump, then close it. 3. Set up the process according to the pump’s purpose; the outlet of the centrifugal pump should be closed. 4. Press the start button to start the pump. 5. Verify that the pump is operating normally, without any noise, abnormal vibrations, leaks, or other issues. 6. The pump outlet pressure should be within the specified range. 7. Once the pump is running properly, open the pump’s outlet valve. III. Operation of the pump: 1. The pressure indication should be stable, with pressure fluctuations remaining within the specified range. 2. There should be no abnormal noises inside the pump casing and the bearing shells; the lubrication should be good, and the oil level should be within the specified range. 3. The motor current should be within the range specified on the nameplate. 4. Record the relevant data and information on time. IV. Shutting down the pump: 1. Gradually close the outlet valve to stop the motor. 2. After the pump stops running, close the pump’s inlet valve.

Reply to 2# chxp110: Thank you! But when is the barring?

Before starting the pump, turn the steering wheel a few times first, then start it.

Reply to 3# kince: I forgot to mention it – right before starting! The purpose of rotating the pump is to check the condition of the centrifugal pump to determine whether it is ready for operation, as well as to allow lubricating oil to reach the bearings

Reply to 5# chxp110 Oh! Thank you for your advice!