How to choose a self priming sewage pump with a suction head exceeding 7 meters

A self-priming sewage pump is a pump that uses the principle of atmospheric pressure to suck liquids up. In theory, the self-priming height of a self-priming sewage pump will not exceed the local atmospheric pressure. We roughly calculate based on one standard atmospheric pressure, the theoretical suction head of the pump is about 10.013 meters, and a self-priming pump with an actual suction head that can exceed 6 meters is considered to have good self-priming performance.

The SP series self suction sewage pump is a self suction pump with good suction power. Without the installation of a bottom valve, the self suction height of the entire series exceeds 7 meters, and the higher the speed, the higher the self suction height. A semi open impeller can pass through larger solid impurities, with a limit of 76mm.

Vacuum assisted self suction pump is a type of pump that uses a vacuum pump to assist in exhaust. The vacuum pump first discharges the air in the pipeline and pump chamber, and the liquid will be sucked into the pump chamber under negative pressure. The self suction height of a self suction pump is related to the ultimate pressure of a vacuum pump, which can theoretically approach absolute negative pressure. In practical applications, it is generally not more than 9 meters affected by pipeline losses and sealing. When the vacuum assisted self-priming pump is running, if the pump itself has poor self-priming performance, the vacuum pump will continue to assist in operation, so the self-priming pump we developed also has good self-priming performance.