增加出水管阻力以减低流量，检查泵吸水管内阻力，检查底阀减小吸水高度。

Add the resistance in the outlet to lower the capacity. Check the resistance in the suction pipe of pump. Check the bottom valve and lower the high of suction position.

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水泵在启动以前，泵壳和吸水管内必须先充满水，这是因为有空气存在的情况下，泵吸人口真空无法形成和保持。

At pump start before the shell and the water pump tube must be filled with water, the air This is because there is existence, the population vacuum pump can not create and maintain.

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陈籍水泵在启动以前，泵壳和吸水管内必须先布满水，这是因为有空气存在的情况下，泵吸人口真空无法形成和保持。

B. water-filled pump start before the pump casing and suction pipe must be full of water that is because of the presence of air vacuum pumping the population can not be formed and maintained.

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