What is the difference between self-priming pump and centrifugal pump _
self-priming pump suction pipe main don't need to install the valve after the first filling can absorbing water, do not need to add water, after more than a centrifugal pump, has its own storage water function, with functions of life-long self-absorption. Centrifugal pump pressure effect, the water level must be higher than the pump, to be able to flow inside the pump, if the liquid level is lower than the centrifugal pump in the intake pipe mouth only install the bottom valve, pump and tube filled with liquid, in order to realize the self-priming, or install the water inlet pipe, for example, the centrifugal pump for a long time does not work, start the water is basically to internal pipe of the pump and the second entry functions, they charged again, more complicated operation, because of long time need not, the bottom of the centrifugal pump valve sealing effect cannot be completely sealed. Liquid will slowly back to leak to the pool, so need self-priming working conditions, better than self-priming centrifugal water pump.
self-priming centrifugal pump used for fluid axial back configuration. Centrifugal water pump by the suction chamber, the liquid storage chamber, vortex chamber, the liquid inlet, gas - Liquid separation chamber, etc. , after the normal boot centrifugal pump, the suction chamber and the impeller suction and stored in the liquid inlet pipe, and fully mixing, when the effect of centrifugal force, the liquid to gas entrainment impeller, described the spiral flow, it is outside impeller peripheral has certain thickness of the outside edge of the white foam and high-speed rotating liquid ring. Through to diffuser gas - gas separation The liquid mixture. In this case, due to a sudden drop in flow, lighter gases from the mixed liquid separation, gas expelled described to continue through the pump exports to rise. Degassing liquid again by reflux hole into the impeller, the impeller and again from the mixture of suction gas suction pipe storage, high-speed rotating impeller, and flow to the impeller outer edge. 。 。 。 。 。 。 One time and again in this process, the intake pipe air gradually reduce, until all air, self-priming pump to complete the process of self-priming centrifugal water pump running. Due to centrifugal pump with the unique ability of exhaust gas, so the self-priming pump which can provide containing gas liquid, without having to install the bottom valve.
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