... h,100 m3/h,120 m3/h,200 m3/h, bucket-wheel and cutter suction dredges of 350 m3/h, cutter ... worn through. And furthermore, even the volute liner breaks, no water leakage will occur.WNQ sump pump is single casing, single ... and cantilever. Fir its frame type, it is oil or water lubricated.Easy for disassembly and maintenanceWN(Q) dredging pumps is ... L seal rings and a sleeve with special thread. water pump