(1) Reliable structure, leakage can be limited to a very small amount. As long as the surface roughness and flatness of the main sealing surface can meet the requirements and the material has good wear resistance, the mechanical seal can achieve very little leakage, and even the leakage is invisible to the naked eye.
(2) Long service life. In mechanical seals, the main wear part is the end face of the sealing friction pair. Because the wear of the sealing end face is not large under normal working conditions, it can generally be used continuously for 1 to 2 years, and can also be used for 5 to 10 years in special occasions.
(3) No adjustment is required during operation. Since the mechanical seal relies on spring force and fluid pressure to make the friction pair fit together, it automatically maintains contact during operation. After assembly, it does not need to be adjusted and tightened like ordinary soft packing.
(4) It has vibration resistance. At a speed of 3000r/min, the maximum amplitude does not exceed 0.05mm. The PV value is continuously improved.
(5) Low power loss. The packing seal works by pressing the packing on the shaft or sleeve. The packing seal directly rubs against the shaft. The tighter the packing is pressed, the greater the friction and the greater the power consumption. The friction of the mechanical seal is in a semi-liquid friction state, and the friction coefficient is very small. The power loss of the mechanical seal is 10-50% of that of the packing seal.
(6) The bellows seal shaft or sleeve is not subject to wear and is insensitive to the vibration of the rotating shaft and the deflection of the shaft to the housing.
(7) It has a wide range of applications. When the medium is flammable, explosive, toxic or harmful, the use of mechanical seals can ensure sealing. It is also suitable for sealing equipment with high temperature, low temperature, high pressure, vacuum, various speeds and corrosive media.
