Mechanical Seals:

In a few locations, packing material is not adequate for sealing the shaft. One general instead techniques for sealing the shaft are along with mechanical seals. Mechanical seals consist of two basic elements, a rotating element attached to the pump shaft and a stationary element attached to the pump casing. Every of these parts have a highly polished sealing surface. A polished faces of the rotating and stationary elements come within contact along with each other to form a seal that avoids leakage along the shaft.