The optimal hydraulic design can effectively improve the outlet flow pattern of suction box to ensure better flow conditions for pump and raise the efficiency of pumping system substantially.
A throttle valve must be installed along outlet pipeline when the conditions of work are not clear or stable, this can guarantee operation at the design point.
当工作条件不明或不稳定时，出口管路中必须安装节流阀，以保证泵在设计点运行。
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When the QUICK scheme is applied, however, the difference between the results under the two kinds of outlet boundary conditions depends on the outlet boundary position.