The KQL,and KQWseries Fourth-generation Single-stage Single-suction Centrifugal Pumps, are well designed by our company using the best hydraulic model and according to different working conditions of different users. This series features compact and reasonable structure, stable and reliable operation; a mechanical seal of a special structure is adopted for this series to improve operating environment and extend the service life; it is also characterized by high efficiency, low operating costs, less administrative costs; small footprint, less construction investment, and favorable market response.