Brief introduction of ZW non clogging Self-priming sewage pump: The main feature of ZW non clogging Self-priming sewage pump is that it will not be clogged. The impeller is retracted in a separate impeller chamber, and the pressurized water chamber is connected with the impeller chamber. When the impeller rotates, the liquid in the pump produces a strong axial eddy current, causing vacuum at the inlet and head at the outlet. Therefore, impurities can be discharged from the pressure chamber, so its flow channel is completely smooth, and its sewage effect is incomparable with other Self-priming sewage pumps. Through the unique design of pump body and impeller passage, it can not only absorb and discharge the liquid containing large solid particles and long fiber impurities, like the general self-priming clean water centrifugal pump, without the installation of bottom valve and irrigation. The old problem of sewage pump blockage is solved. Working conditions of non clogging Self-priming sewage pump: 1. Environmental temperature ≤ 50 ℃, relative humidity < 95%, medium temperature ≤ 80 ℃, special requirements up to 200 ℃. 2. The pH value of medium is 6-9 for cast iron and 2-13 for stainless steel. 3. The medium weight of self-priming sewage pump shall not exceed 1240kg / m3. 5. The self suction height should not exceed the specified value of 4.5-5.5m, and the length of suction pipe should be ≤ 10m. 5. The diameter of suspended particles is 60% of the diameter of the pump, and the fiber length is 5 times of the diameter of the pump.