How it works: the piston moves from left to right, form a negative pressure pump cylinder, then the suction tank fluid through the valve into the pump cylinder.
工作原理：活塞自左向右移动时，泵缸内形成负压，则贮槽内液体经吸入阀进入泵缸内。
Pump stop, they would first close the discharge stop valve, and switch to a complete halt until pump suction stop valve was closed.
泵停车时，应先关闭排出停止阀，并待泵完全停转后关闭吸入停止阀。
Installations with suction lift require a good quality foot valve to avoid loss of prime - remove in-built check valve.
进水口的安装需要使用一个品质优良的底阀，以避免进水口压力损失- 拆除内置式止回阀。
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