The disadvantages of the Packing seal for slurry pump

1, It requires the loss of 10% to 15% of the shaft power to overcome the frictional force between the sleeve and the filler to effect a seal.
2, Packing seal contact force comes from the packing gland on axial pressure filler leaving the radial expansion force, resulting in greater friction between the filler and the sleeve, thus it require frequent replacement of worn sleeve.
3, Packing seal leakage is easy to make drain fluid into the bearing housing, causing damage to the bearings.
4, In order to move away the friction between packing and the shaft, it must have quantitative leak, resulting in the loss of cooling water. In short, the advantages of packing seal is simple. The disadvantage is the maintenance workload, power loss is large, and because it is always a certain degree of leakage, it does not apply to the transportation of flammable, explosive, toxic and precious liquids .
5, Packing seal during use, due to the packing often used in a non-normal state, it exacerbates the damage to the packing and the sleeve wear, making use of packing in a vicious cycle.