Open single channel impeller with a hardened cutter for the CP series, non-clogging close impeller for QW series, Free standing or fixed installing. IP68 motor with double mechanical seal, overload and leakage sensor. Open jacket cooling system for optimum motor cooling, Cable inlet with strain relief and anti-kink protection. Auto-coupling system and automatic type are on request. Adjustable bottom plate as an anti-blockage device for the pumping of seawage containing solid or fibrous matter.