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Daily Maintenance And Maintenance of Centrifugal Pumps

Sep. 04, 2020
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Regarding centrifugal pumps, many people don’t know how to maintain them to make their life longer. Here are some tips from Centrifugal Pump Suppliers:


(1) Keep the equipment clean, dry, free of oil and leakage.


(2) Check every day whether the running sound of the centrifugal pump is normal, whether there is vibration and leakage, and deal with the problems in time.


(3) Check whether the oil level in the oil chamber of the centrifugal pump suspension is appropriate every day, and it must be kept at 1/3 and 2/3 of the oil standard.


(4) It is strictly forbidden for the centrifugal pump to work in the state where the liquid in the pool (barrel) is evacuated, because the centrifugal pump working in the evacuated state not only vibrates severely, but also affects the life of the pump, so special attention must be paid.


(5) It is strictly forbidden to enter the centrifugal pump with metal objects and flexible materials such as rubber, cotton yarn, plastic cloth, etc., so as not to damage the flow parts of the pump and block the flow passage of the impeller, so that the pump cannot work normally.

Centrifugal Pumps

Centrifugal Pumps

(6) Check the concentricity of the claw coupling regularly.


(7) For Centrifugal Pumps with packing seals, check the leakage at the stuffing box regularly. The normal leakage at the stuffing box should be 10-20 drops per minute; otherwise, adjust the tightness of the packing gland. It is recommended to use mechanically sealed centrifugal pumps such as KKW series horizontal centrifugal pumps


(8) The bearing temperature should be checked frequently, and the maximum temperature should generally not exceed 70℃~75℃.


(9) In the first month of operation of the water pump, after 100 hours of operation, replace the lubricating oil in the suspension oil chamber, and then replace the lubricating oil every 500 hours of operation of the water pump.


(10) Always check whether the support mechanism of the centrifugal pump inlet and outlet pipeline system (pipe fittings, valves) is loose. Make sure that the support mechanism is firm and the pump body does not bear supporting force.


(11) Always check the fastening of the fastening bolts of the centrifugal pump foundation. Ensure that the connection is firm and reliable.


(12) When the centrifugal pump is not used for a long time, the pump should be disassembled, rust-proofed, reinstalled, and stored properly for next use.


(13) When the spare centrifugal pump installed in the production system does not operate for a long time, it should rotate 1/4 turn per week to make the pump shaft evenly bear the static load and external vibration, especially the High-pressure Centrifugal Pump.


(14) The centrifugal pump runs for about 2000 hours. Periodic inspections should be carried out to repair or replace damaged parts to keep the pump in good condition.


(15) For newly installed and overhauled centrifugal pumps, you must first test the motor steering before putting on the coupling pin.


(16) The centrifugal pump allows the liquid in the pipeline to reverse flow when the motor is powered off. However, special attention should be paid to when the centrifugal pump conveying height difference is particularly large, a check valve should be set on the pipeline to prevent the backwater from flowing back and control the sudden reverse of the centrifugal pump.


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