Horizontal single-stage centrifugal pump relies on the rotating impeller to exert force on the liquid to transfer the mechanical energy of the prime mover to the liquid. Due to the action of the centrifugal pump, when the liquid flows from the inlet to the outlet of the impeller, its velocity energy and pressure energy are increased. The liquid discharged by the impeller passes through the pressure chamber, and most of the velocity energy can be converted into pressure energy, and then transported along the discharge pipeline. At this time, a vacuum or low pressure is formed at the inlet of the impeller due to the discharge of the liquid, and the liquid in the suction pool is pressed into the inlet of the impeller under the action of the liquid surface pressure (atmospheric pressure), so the rotating impeller is continuously Aspirating and expelling fluids.

The lift of the horizontal single-stage centrifugal pump refers to the height that the pump can lift water, which is usually indicated by the symbol H, and its unit is meters. The head of the centrifugal pump is based on the center line of the impeller, and is divided into two parts. The vertical height from the center line of the pump impeller to the water surface of the water source, that is, the height that the pump can suck up water, is called the suction lift, or suction lift for short; The height, that is, the height at which the water pump can press the water up, is called the water pressure lift, or the pressure lift for short.
Horizontal single-stage centrifugal pump manufacturers tell you that the head refers to the head that the pump itself can generate, and it does not include the lost head caused by the frictional resistance of the water flow in the pipeline. When choosing a water pump, be careful not to ignore it. Otherwise, there will be no water.