Mechanical seals, also known as seal, rotary shaft seals are mainly used pumps, compressors, hydraulic and other similar devices. Mechanical seal by a pair of plane and several seals and static friction ring on the ring composed of Vice composition.
    Mechanical seals are lower by at least one end surface perpendicular to the axis of rotation under fluid pressure and the force of the correction means (or magnetic), and the role of the secondary seal is held in abutment with the combined relative sliding means to prevent fluid leakage. Secondary seal ring is called compensation bellows mechanical seal is a metal bellows.