The difference between a self-priming pump and a centrifugal pump

The difference between the self-priming pump and the centrifugal pump is mainly the self-priming pump inlet pipe does not need to install the bottom valve After the first filling can be sucked water up, do not need to add water after the pump than the centrifuge Pump a lot of their own water storage function, with a water diversion lifelong self-priming function. Self-priming pump and the difference between the centrifugal pump and the centrifugal pump is to play the role of booster, the liquid level must be higher than the pump to the pump body to start inside Liu, if the liquid level lower than the centrifugal pump only in Inlet pipe suction inlet valve installed Bottom pump and pipe filled with liquid in order to achieve self-priming function, or installed in the import of diversion cylinder, such as the pump does not work for a long time centrifugal pump, the second start when the import pipe and pump body The inside of the water is basically gone, but also have a re-irrigation water, the operation is more troublesome, because the long-term centrifugal pump inlet valve seal can not be completely sealed effect of the liquid will slowly leak back to the pool, so the need to self Self-priming pumps have a better pump performance than centrifugal pumps with suction. Self-priming, centrifugal pumps are used axial back to the pump body structure. Centrifugal pump body consists of suction chamber, liquid storage chamber, scroll chamber, back to liquid hole, gas-liquid separation chamber and other components, the centrifugal pump is normally started, the impeller will inhale the liquid stored in the chamber and inhalation of the air in the tube together, The impeller is completely mixed, and under the action of centrifugal force, the liquid entrains the gas to the outer edge of the scroll chamber to form a certain thickness of white foam belt and a high-speed rotating liquid ring on the outer edge of the impeller. The gas-liquid mixture enters the gas separation chamber through the diffusion tube. At this point, due to a sudden drop in flow rate, the lighter gas is separated from the mixed liquid, and the gas continues to rise through the pump outlet. The degassed liquid returns to the liquid storage chamber and re-enters the impeller through the backflow hole, re-mixes with the gas sucked in from the suction pipe inside the impeller, and flows to the outer edge of the impeller under the action of a high-speed rotating impeller. As the process goes on and off, the air in the intake pipe is continuously reduced until the air is exhausted. The self-priming pump completes the self-priming process and the centrifugal pump is put into normal operation. Because this centrifugal pump has this unique ability to exhaust gas, the self-priming pump delivers liquids containing gas without the need to install a foot valve and has good sweep capability when used on a cruise ship. (Editor: Xiaoxia QQ:) Recommended reading: 2017 exhibition information