Immersed Pumps have a suction port immersed in a liquid to draw the liquid upwards. These pumps consist of an impeller, which is mounted at the tip of a rotating shaft and the rotating shaft drives and rotates the impeller by a motor mounted at the upper end of a body frame, in order to draw in a liquid from a suction port provided at the lower end of housing in the body frame. The liquid is then pressurized and discharged sideward from an ejection port through a channel in the side of the body frame to the top. Since an immersed pump of this type force-feeds a liquid upward, the liquid may leak to the frame through the circumference of the motor's rotating shaft. Thus a shaft sealing apparatus such as a mechanical seal is used to support and seal the rotating shaft to prevent leakage. Immersed pumps are used in machine tool systems, cooling systems, pressure boosting systems, water supply chains, commercial washing systems and in wide range of high pressure applications with high flow rate.