Operating procedure of centrifugal pump

The operating principle of centrifugal pump is that swing water by taking advantage of centrifugal force produced by the rotation of pump impeller to increase the energy of water and then the water will deliver to the destination through pump case, pump outlet and pressure pipe.

1. Check-up before starting the pump

① Check if pump, valve and coupling screw of filter are fixed, if foundation bolt is loose and if motor grounding is connected securely.

② Check if shaft bolt is loose and rotate the pump 3 to 5 circles by hand to check if it rotates flexibly.

③ Check if there is oil at and if water is into the lubrication parts; add oil to the specified position if oil lacked.

④ Open pressure gauge and cooling water valve.

2. Stat the pump

Press the start button to open the pump and after pump pressure reaching the rated value, open outlet valve slowly until adjusting pump pressure to the specified value.

3. Check-up in the operation process

① Observe the fluctuation of pressure and current at any time in the operating process, which should be no more than specified value.

② In the operating process, listen to if the rotate sound of pump is normal; check if the seal oil leakage is in the allowed scope; if the amount of cooling water is proper; check if the temperature of parts is overheat.

③ Check the leakage of mechanical seal: light oil should be no more than 10 drips per minute and heavy oil should be no more than 5 drips per minute.

④ Adjust flow or head, which should be controlled through outlet valve.

4. Stop the pump

when stop the pump, close outlet valve firstly and then close inlet value.