Some mechanical seals produce non-erosive wear type seals to prevent wear on the mechanical seal

Some mechanical seals produce non-erosion wear type seals to prevent wear

2021-07-30 11:31

However, the only permanent solution to the erosion wear problem is to remove the dynamic seals inside it. At present, most of the major mechanical seal manufacturers produce non-erosive and wear-resistant seals to prevent the erosion and wear of liquid pump parts.

Mechanical seal inner seal and outer seal

It is very common practice to install the seal inside the stuffing box. However, this method requires the wet end of the liquid pump to be disassembled during seal maintenance, and its main advantage is that the environmental sanitation of the seal is easy to control.

The installation method of the outer seal is to reverse the direction of the static sealing surface, and the torsion unit on the main shaft is located on the surface of the gland of the stuffing box. The outer seal mainly has the following five benefits:

1. Easy to install;

2. The price is relatively low;

3. It can be continuously monitored and cleaned;

4. Suitable for very small stuffing boxes that cannot be sealed inside;

5. Due to its location close to the bearing, it has less influence on the difficulty of spindle misalignment.

Its main disadvantage is that centrifugal force will throw solid particles from the bottom of the mechanical seal to the contact surface of the seal. Therefore, this type of seal is mainly suitable for liquids that are clean and do not contain abrasives.