For top efficiency, be sure the proper valve is used.

为了获得最好的效率, 请确保采用最恰当的通径.

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Reference Figure 1 and Figure 2 for proper valve orientation.

关于正确的阀门定位,请参考图1和图2.

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Be sure to use proper valve material - types for both temperature and chemical resistance.

确保采用与温度和耐化学性相匹配的材质的阀门.

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