Different Components and Seals Used in The Pumps

Different Components and Seals Used in The Pumps

Pumps are used in most of the process industries to maintain the production and processing of different kinds of chemicals, pharmaceutical products and various kinds of food items. Let us therefore get introduced to its various important parts and components of the common motors that are used in various kinds of industries.

Following are few main components of any kind of sanitary pumps that you can commonly find in any process industries:

  1. Casing
  2. Impeller
  3. Shaft
  4. Shaft seal
  5. Backing plate
  6. Motor adapter

In some of the pumps, its backing plate will be the integral part of the casing and it will have a removable cover.

Shaft seals

Among the various components of any pump, shaft seals are one of the critical parts and therefore its proper selection is very important for the proper performance of the system.  In many traditional types of pumps, you will find it is fitted with stuffing box or packing gland with row of different packing fabric, which are stuffed and tightened to act as a seal. You can also find the same in any shaft of any ship propeller. For any brewery industry this is not a preferable solution.

Nowadays in most of the modern pumps there are mechanical sealings provided. This kind of mechanical seal can also rotate as the pump shaft rotates and, in some cases, the rotating seal as well as stationery seal may rub against each other. Usually, the rotating seals make use of carbon material and also many other materials like ceramic, Teflon or silicon carbide are also used. The stationery seals are usually made of stainless steel, silicone carbide or ceramic. Rotating seals are usually inside the housing of the pump which remains submerged in the liquid or behind the external casing.

The usefulness of having an external seal is that in the pump’s product area, there are only few parts and therefore it facilitates easier cleaning, which is very essential in any brewery industry.

Mechanical seals are utilized with many process liquids. Every type of liquid has different lubrication characteristics. Usually, for proper lubrication a thin film lubricator is the most preferred option. A film that is too thick will usually increase leakage and may permit particulate between the faces, which will expand wear from abrasion. A thin film will generate heat, causing materials to degrade. You need to keep the sealing interface clean and cool, in order to increase its seal life.