ZS series self-suction pumps are energy-saving pumps designed according to ISO international standards and developed through the improvement of related technical data, both at home and abroad and use a mechanical seal of ceramic rings to prevent gritty liquid from entering the sealing surface, preventing it scratched. This pump has the advantages of compact structure, easy operation, stable movement, easy maintenance, high efficiency, long duration, strong self-suction capacity and no foot valve is required to be installed in the pipeline. Only a certain amount of main fluid must be filled into the pump before working, improving working conditions while simplifying the piping system.