Precautions For Using Submerged Pumps

Submerged pumps are commonly used for fluid transfer; the following precautions should be observed during operation:

 

Before Installation

Verify that the pump model and specifications meet operational requirements and check that all components are present and undamaged.

Thoroughly clean the pump to remove internal impurities and anti-rust agents, ensuring the interior is clean.

Ensure the pump foundation is solid and reliable, with a levelness deviation not exceeding 0.1/1000, to guarantee proper operation and service life.

When installing suction and discharge piping, ensure tight sealing to prevent air or liquid leaks. Keep suction piping as short and straight as possible, minimizing elbows and valves to reduce flow resistance.

 

Before Startup

Fill the pump with a sufficient amount of the fluid to be transferred; dry running is strictly prohibited to avoid damaging seals and bearings.

Check that the inlet and discharge valves are in the correct open position to ensure smooth fluid flow into and out of the pump.

Verify that the motor's rotation direction matches the pump's rotation indicator; if they do not match, stop the motor immediately and adjust to prevent pump damage.

Before fully starting the motor, "jog" it briefly to observe pump operation; if abnormal noise or vibration occurs, stop immediately for inspection.

 

During Operation

Closely monitor the pump's operating status, including parameters such as current, pressure, and temperature, and address any abnormalities promptly.

Regularly check the pump's sealing to prevent leakage; monitor seal wear and replace severely worn seals in a timely manner.

Periodically clean the pump filter to prevent clogging, which could affect flow rate and discharge head.

Monitor lubrication and perform maintenance according to specified schedules and requirements to ensure the proper functioning of bearings, gears, and other components.

Avoid prolonged overload operation to prevent damage to pump components.

 

After Shutdown

Gradually close the discharge valve and stop the motor to avoid pump damage caused by sudden stops.

Clean the pump's interior and exterior to remove residual fluid and impurities, keeping the unit clean.

Inspect pump components for damage or wear, and repair or replace them as necessary. Perform regular maintenance on the pump-including replacing seals, bearings, and lubricating oil-to extend its service life.