The self -suction pump is a single -stage single -suction lyric cardia that produces a self -absorbing effect by the special structure of the pump itself. Compared with ordinary centrifugal pumps, there is a significant difference in the structure of the pump body: one is that the pump inlet position is improved, and sometimes the inhalation valve is also installed; the other is to set up a gas separation room on the water side of the water.

The pump outside the pump is a self -priming device outside the pump, such as a vortex pump, a water ring vacuum pump, a radiation pump, and a manual pump.

Compared with ordinary centrifugal pumps, the self -suction pump has a compact structure and a simple use operation. It not only eliminates the trouble of drooling a lot of water before starting, but also eliminates the low valve of the water inlet pipe, reducing the water inlet resistance, increasing the water output of the pump water outlet, However, the efficiency of ordinary centrifugal pumps of the same specifications is 3%to 5%lower than that of ordinary centrifugal pumps. There are more self -suction pumps on light small spray irrigation units and pipe irrigation units.