Mechanical seal installation

Multistage pump seal installation:

1. Sealing form: For static seals, there are usually only two forms of gaskets and sealing rings, and the sealing ring is the most widely used O-ring;

For dynamic seals, centrifugal pumps rarely use packing seals, mainly mechanical seals, which are divided into single-end and double-end, balanced and unbalanced types. 1.0MPA); double-end machine seals are mainly used for high temperature, easy to crystallize, viscous, particle-containing and toxic and volatile media, double-end machine seals should inject isolation fluid into the sealing cavity, and the pressure is generally higher than the medium pressure 0.07 ~ 0.1 MPAs.

2. Sealing material: The material of the static seal of the multi-stage centrifugal pump is generally made of fluorine rubber, and the PTFE material is used in special cases; the material configuration of the dynamic and static rings of the mechanical seal is more critical, and it is not the best for cemented carbide. On the one hand, the price is high. It is unreasonable that there is no difference in hardness between the two, so it is best to treat them differently according to the characteristics of the medium.