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1. What is the suction lift of a self-priming pump? How many meters are the suction lifts of various self-priming pumps? The suction lift of a self-priming pump refers to the vertical height from the low liquid level at the inlet of the self-priming pump to the self-priming pump. It represents the suction lift of the self-priming pump. The loss of the horizontal distance needs to be calculated based on the size of the pipeline, the number of elbows, and the flow rate of the self-priming pump. There are self-priming pumps with a self-priming height of 3-4 meters: FPZ plastic corrosion-resistant self-priming pump, ZCQ self-priming leak-free magnetic pump, ZXB fluoroplastic corrosion-resistant self-priming pump, SFBX small stainless steel self-priming pump. There are self-priming pumps with a self-priming height of 4-5 meters: ZW self-priming sewage pump, ZX self-priming centrifugal pump, WFB sealless self-control self-priming pump, BYQYZ gas-liquid mixed transmission self-priming pump. 2. The relationship between the suction head and the lift of the self-priming pump. The lift of the self-priming pump is actually related to the suction head data. For example, the lift of the self-priming pump is marked as 15 meters. In addition, the suction head is lost by 3 meters in actual use, so the result needs to be the result of the lift of 15 meters - the suction lift of 3 meters. It is the actual lift that this self-priming pump can achieve in use. In short, the greater the suction loss, the lower the lift of the self-priming pump. Many users and manufacturer sales personnel do not understand this principle, so they ignore this important detail when selecting models, such as: The head loss required for on-site working conditions is 15 meters, and the suction head of the self-priming pump requires 4 meters. When selecting the head of the self-priming pump, 15 meters should be selected. In this case, when the self-priming pump is purchased and installed and put into use, the self-priming pump head will not reach 15 meters. Many users will think that it is a self-priming pump. If the lift is not reached, it is actually because the suction lift of the self-priming pump is lost and the lift of the self-priming pump is lost. Therefore, when selecting the self-priming pump model, the suction lift of the self-priming pump should be calculated. If you know the required self-priming height and the required lift, you should add the two data when selecting the model. The resulting data is the lift of the self-priming pump that should be selected. 3. The relationship between the suction lift and flow rate of a self-priming pump. In fact, the relationship between the suction lift and flow rate of a self-priming pump is roughly the same as the relationship between the suction lift and lift of a self-priming pump. The higher the suction lift of a self-priming pump in use, the smaller the flow rate of the self-priming pump. For example, the self-priming height marked on some high-suction lift self-priming pumps can reach 9 meters or the horizontal distance can reach more than 150 meters. Above, this type of self-priming pump will have a certain flow loss when the self-priming height is high and the horizontal distance is far away. It is very likely that it cannot meet the flow data marked in the model parameters. If the pipeline is long, we need to calculate the corresponding self-priming pump suction loss based on the material and size of the pipeline combined with the required self-priming pump flow rate. 4. The relationship between the flow and head of the self-priming pump. The relationship between the flow and head of the self-priming pump is closely related. During use, if the head is low, the flow of the self-priming pump will increase. Therefore, many users report that the self-priming pump motor is overloaded and over-current. In this case, the flow of the self-priming pump can be controlled by controlling the self-priming pump outlet valve so that the flow does not exceed the flow, and the current can be controlled. On the contrary, if the lift used is higher than the rated lift, the flow rate of the self-priming pump will also be reduced. - This article comes from * * Chemical Industry Forum