Mechanical Seals – An Overview

A Mechanical seal joins together the various components of a plumbing system so as to effectively seal and prevent leakage of fluids. The mechanical shaft seals for sumps hold the fluid within the plumbing system whether it is a pump, mixer or other mechanical machines.  This is facilitated by a rotating shaft which is made to pass through housing, maintained stationary. In other cases, the shaft remains stationary while the housing rotates. mechanical shaft seals for pumps helps in preventing the fluid from escaping from within the pump.

In centrifugal pumps, a rotating Mechanical Seal is inserted into the pump and tightened with the help of a mechanical seal so as to prevent large volumes of liquid from gushing out. A mechanical seal is introduced to the pump between the shaft and the housing. The following are the reasons as to why mechanical seals  are used:

  • With constant friction happening in the pumps as a result of the rotating shaft, it begins to leak over time. This is when mechanical seals are required and demands for it are placed with mechanical seal suppliers so as to adjust it and prevent leakage.
  • In addition to this, there is also the need for flushing out the shaft with lots of water so as to keep it clean and free of dust, grime and to maintain coolness.
  • a mechanical seal helps in providing more drive power to the shaft. The absence of leakage of liquids saves extra manpower, maintenance and wastage of energy.
  • With the passage of time, the shaft will wear out and form open gaps in the groove, this is when one needs to place an order for it with mechanical seal suppliers in UAE.  It could be quite expensive to repair and replace it. This is where mechanical seals prove to be handy and cost-effective.

Every mechanical seal comes with 3 sealing points.

  • The primary seal.
  • The rotating seal and
  • The stationary seal.

A static mechanical seal is used to seal the stationary portion of the pump. The mechanical seal joins together the o-ring or the gasket to the stationary portion of the pump and its housing.

The mechanical shaft seals for pumps also comprises of a rotary part which is used to join together both the o-ring and the shaft. In this case, the shaft of the pump is rotated by the mechanical seal.

Another part of the mechanical shaft seals for pumps is specially designed to accommodate and adjust the entire setup in case of shaft deflections and to eliminate any sort of inefficiency in case of manufacturing defects.

Out of these three sealing points, two of them are static, while the other is rotatory.  The primary seal is the basis of all and it is widely used for efficiency. It comprises of spring, two flat surfaces, 1 fixed face and 1 rotating face, each of which works against each other. The hydraulic force pushes them together and the spring force holds it in place.  In this way, the mechanical seal prevents leakage in a shaft and holds the rotating and stationary components together.