Mechanical seals is being used increasingly on fluid pumps to replace packed glands and lip seals. Pumps with mechanical seals perform more efficiently and generally perform more reliably for extended periods of time. Mechanical seals are provided to prevent pumped fluids from leaking out along the drive shafts.

Mechanical Seals
A mechanical seal is a sealing device which forms a running seal between rotating and stationary parts. They were developed to overcome the disadvantages of compression packing. Leakage can be reduced to a level meeting environmental standards of government regulating agencies and maintenance costs can be lower. Advantages of mechanical seals over conventional packing are as follows:

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If you had a drop of oil on your carport floor immediately under the engine block of your Ferrari, how would you imagine the oil drop found its way to your carport floor? Would you imagine that it splashed out of the dipstick spout? Did it sweat through the engine block? What do you think? Of course you already know the answer. That little drop of engine oil leaked through a gasket seal on the oil pan.