When there is air in the centrifugal pump housing, there is less centrifugal force due to the density of the air being much less than the density of the liquid. Thus, the tank above the liquid level and the pump inlet pressure difference is not enough to liquid storage tank pressure into the pump, that is, centrifugal pump without self-suction capacity, so that the centrifugal pump can not deliver liquid, a phenomenon called "gas tied phenomenon". In order to fill the centrifugal pump with a liquid, a bottom valve with a strainer is usually provided at the bottom of the suction pipe. The bottom valve is a check valve. The filter serves to prevent the solid matter from entering the pump to damage the impeller or impede the normal operation of the pump.
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The application of Si3N4 ceramics on automotive engines has opened up a new dimension for the development of new high-temperature structural materials. The automobile industry itself is a multidisciplinary industry that integrates all kinds of science and technology. China is an ancient civilization with a long history. It has made brilliant achievements in the history of ceramic development. With the progress of reform and opening up, one day, China also It is bound to be among the world's major auto industry countries, creating new glory for the development of ceramics.
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Dongguan Haikun New Material Co., Ltd. , https://www.hkceram.com
