Mechanical seal refers to at least a pair of end faces perpendicular to the axis of rotation under the action of fluid pressure and the elastic force of the compensation mechanism (or magnetic force) and the auxiliary seal to keep fit and to prevent fluid leakage.
The elastic loading mechanism and the auxiliary seal are the mechanical seals of the metal bellows, which we call the metal bellows seal. In light-duty seals, rubber bellows are also used as auxiliary seals. Rubber bellows have limited elasticity and generally need to be supplemented with springs to meet the loading elasticity. "Mechanical seal" is often referred to as "mechanical seal".
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