... body, pump shaft, bearing, sealing ring and stuffing box.1, impeller is the core part of centrifugal pump, ... the effect of pump shaft is using coupling to connect with motor, making the motor torque to transfer to ... 25 ~ 1.10 mm is advisable.6, stuffing box mainly composed by packing, the water seal ring, ... pay more attention to the check of stuffing box in the operation. It should replace the material ...