The valve features a transitional flow contour that increases in flow area from inlet to outlet.

该阀采用了过渡流轮廓,增加了从入口到出口的流动面积.

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Under assuring maximum flow area , it is the best to design the section shape for streamline.

在保证最大过流面积的条件下,阀球罩的断面形状应该尽量采用流线型,以减小过流阻力.

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The calculating formula for flow area is giving by application of basic theory.

应用基础理论推导出通流面积的计算公式,并举例说明其计算方法.

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