Centrifugal pump of mechanical seal dress water seal water

The utility model relates to a centrifugal pump, specifically speaking are centrifugal pump of mechanical seal dress water seal water. Include that the pump body reaches and pump body connection's bearing seal case, wherein the holding has the cover to establish at the epaxial impeller of pump in the pump body, bearing seal incasement holding has the cover to locate the epaxial mechanical seal of pump, be equipped with on the bearing seal case with the through -hole of the inner chamber of bearing seal case intercommunication, the machine that is equipped with on this through -hole seals the flushing pipe, the machine seal a flushing pipe be used for with outside water piping connection, seal the flushing pipe through the machine and introduce the sealed water that is higher than the atmospheric pressure to the bearing seal incasement, make the holding be full of water seal water between the mechanical seal's of bearing seal incasement rotating ring and quiet ring, stop the pump water -logging to the outflow.