The main features of the power pump are as follows:
1 The lift generated by a certain pump at a certain speed has a limited value. The operating point flow rate and the shaft power are dependent on the condition of the device system connected to the pump (position difference, pressure difference and line loss). Head changes with flow
2 work is stable, continuous transmission, flow and pressure without pulsation.
3 Generally, there is no self-priming ability. The pump must be filled with liquid or evacuated into a vacuum before it can start work.
4 The centrifugal pump is started with the valve of the discharge line closed. The vortex pump and the axial pump are started with the valve fully open to reduce the starting power.
5 Centrifugal pumps are suitable for direct drive with high-speed motors and steam turbines. They are simple in structure, low in manufacturing cost and easy to maintain.
6 Wide range of applicable performance, centrifugal pump flow rate can be from several to hundreds of thousands of meters 3/hour, head can be from a few meters to several kilometers; axial flow pump is generally suitable for large flow and low head (20 meters). The efficiency of centrifugal pumps and axial flow pumps is generally below 80%, and up to 90%.
7 It is suitable to deliver clean liquid with low viscosity (such as fresh water). Specially designed pumps can transport mud, sewage, etc. or water to transport solids. Power pumps are mainly used for water supply, drainage, irrigation, process fluid delivery, power station energy storage, hydraulic transmission, and ship injection propulsion.