The commonly used sealing devices for centrifugal pumps have their own advantages and disadvantages. The most suitable sealing device should be selected based on comprehensive considerations of specific working conditions, medium characteristics, sealing requirements, and economic factors.

The packing seal of the water pump is an economical and practical sealing method with the advantages of simple structure, low cost and easy installation. However, it is also necessary to pay attention to its shortcomings and maintenance requirements during use to ensure its good sealing performance and service life.

Through the correct steps, the replacement of the packing of the multi-stage centrifugal pump can be ensured to proceed smoothly, and the normal operation and sealing effect of the pump can be guaranteed.