No pressure double pressure-tight seal within the system generally atmospheric pressure or slightly Baoding mechanical seal manufacturers, seal chamber pressure levels lower than before sealing. When the primary seal leakage, Xingtai mechanical seal manufacturers, the pump seal liquid medium will enter the system, mechanical seal manufacturers, leading to pressure and level sealing liquid system rises, when double mechanical seal structure such as work, Hengshui mechanical seal manufacturer , under the joint effect of the fluid pressure such as elastic (medium pressure) and the elastic element caused the end face of the sealing ring generates an appropriate pressure (pressing force), the two abutting surface (ring, quiet ring face ) fit closely with each other and maintain a very thin layer of film in a very small gap between the two ends faces, so as to achieve the purpose of sealing. Double mechanical seal prescribe seal