Mechanical seal (mechanical seal) is defined by at least one pair of end face perpendicular to the axis of rotation the fluid pressure and compensation unit elastic (or magnetic) and auxiliary coordinates remain posted combined consisting of sliding device to prevent fluid leakage. Spring loading mechanism with auxiliary mechanical seal for sealing of metal corrugated tube we call metal bellows seal. Light seal, there are sealed with rubber bellows as an auxiliary, elastic rubber bellows are limited, generally need to be complemented by a spring loaded to meet stretch. "Seal" is usually referred to as "the machine".
Is a rotary shaft seal mechanical seal device. Such as centrifugal pumps, centrifuges, reactors and compressors and other equipment. Due to the drive shaft runs through both inside and outside the device, so that there is a circular gap between the axis and the equipment and media to the leakage through the gap in the device, if the device is internal pressure below atmospheric pressure, air leaks into the equipment and must therefore have a stop leak sealing system. Many different types of shaft seals due to leakage of mechanical seal and long life and other advantages, so the mechanical seal in the world is the main shaft sealing of these devices. Mechanical seals and seal, is defined in the relevant standard: "by at least one pair of end face perpendicular to the axis of rotation the fluid pressure and compensation unit elastic (or magnetic) and auxiliary work posted under consolidated consisting of sliding device to prevent fluid leakage. "