The pressure here means that the pressure provided by the water pump is greater than the total pressure loss of the system. If there is a head of the head in the construction diagram, the selection of the pump must meet this requirement. In addition to considering stress, we must also take into account the impact of water flow. The larger the water flow, the smaller the useful pressure provided by the pump. On the contrary, the greater the pressure. When the water flow is zero, the pressure is the largest.

In addition to considering the consistency of the water pump and the diameter of the pipeline, the selection of the pump must also consider whether the selected power and raising can truly supercharged and stabilize, but also the convenience of use.

A. First of all, determine the working voltage, current, raising and flow, caliber size. There is no static raising of the water flow when the pump is up to the maximum journey. The required journey must be higher than the specified pumping height. You can refer to the raising flow curve diagram and determine.

B. Select volume and appearance requirements (thread interface, direction of inlet and out of water inlet, caliber size, etc.)

C. Determine the working environment (temperature, medium)