... 1200 kg/m3;PH: 5~9(2) Purpose:CQW (QW) series sewage pump is mainly used for Municipal works, Industry buildings ... using a unique double channel non-clogging impeller structure, improve the sewage overcurrent and discharge capacity.2, automatic mixing device. Have strong stirring ... to heat,protector makes action in time, cut off power supply automatically, so that after cooling the motor automatically ...