When the self-balancing multi-stage centrifugal pump is actually working, the outlet pressure indicated by the pressure gauge is the sum of the vertical height from the axis line of the self-balancing multi-stage pump to the drainage surface and all the head loss on the drainage pipeline, and the vacuum degree indicated by the vacuum gauge. It refers to the sum of the vertical height from the axis line to the suction surface and all losses on the suction pipeline. During use, the sum of the vertical height from the suction surface to the discharge surface plus the various losses on the suction and discharge pipelines must be within the specified head of the pump. The self-balancing multi-stage centrifugal pump is best under the design point working condition. In operation, if the head exceeds the specified range for a long time during operation, the safety of the entire pipeline system will be affected, and it is not economical to use. For a relatively low water pump, the shaft power will increase rapidly, which will cause the motor to overload and easily burn out; when the flow rate increases, the allowable suction height of the water pump decreases as the flow rate increases, and the water pump is prone to cavitation, which has a great impact on pump performance Great influence, poor use economy, so when using self-balancing multi-stage pump, the head is not allowed to run under the specified working conditions. The schematic diagram of the installation height of the self-balancing multi-stage centrifugal pump is as follows:
