For a very long time, packing materials are often used to contain leaks. They are made using soft, flexible materials that are versatile enough to be used in any application. Traditionally, gland packing is the most popular method of packing used in sealing. It has been proven to be effective, cost efficient and is quite versatile making it the reliable choice for many industrial applications. These thick synthetic materials are physically stuffed to fill the gap between the mechanism to avoid leaks but because of their design, they are not ideal in areas where contaminated gas or other vapor substances are supposed to be contained.
Evolution of Mechanical Seals
With time, industries realized the importance of mechanical seals as they are highly efficient and never allows leakage unlike gland packing that doesn't get the job done in specific scenarios. Right from its first design, it has undergone so many changes until the modern version of the seal came into being. The one being used now has three different sealing points, where an o-ring or gasket clamp is used to tightly connect the pump housing with the stationary part.
A significant advantage of using mechanical seals is that they are made using simple architecture that are designed for redundant usage. Industries are always filled to the brim with piled up work and machineries are used throughout the week without any break. As they are simple gaskets or o-rings made using highly durable steel or other suggested materials, they can withstand the wear and tear of everyday usage.