After reading the following, we can understand why the clean water pump can not be used for sewage disposal. The sewage pump is one of the centrifugal pump types. The structure and principle are the same as those of a general centrifugal pump. The sewage pump also has its own structural characteristics. The lift of the sewage pump is not high. Because there are more impurities in the sewage, the gap of the impeller is larger than that of the clean water pump. Here we briefly talk about the difference between the two pumps.
1. In order to prevent blockages, the sewage pump is mainly designed with large flow passages, which naturally leads to relatively low efficiency, so the lift is generally not high. The flow path of the clean water pump is smaller, the gap is smaller, and the lift is relatively higher.
2. In order to prevent the impeller of the blowdown sewage pump from being designed to be simpler than the clean water pump, there is no retaining ring but it is equipped with a serrated piece. The cloth head and other debris can be crushed and pumped out. The impeller of the clean water pump is more complicated, but the working efficiency is Will be significantly higher than the former.
3. The trouble that the sewage pump is easy to produce is similar to that of the general centrifugal pump. Because the sewage is pumped, the impeller wears faster. In order to prevent wear and corrosion, the sewage pump generally adopts a mechanical seal with better wear resistance, strong corrosion resistance and O-ring as a seal of the water pump.
