若密度比、静温比相同或相近时，速度差对总压损失的影响可忽略。
The effect of the velocity difference on total pressure loss may be neglected, if the density and the static temperature difference are equal.
但速度差随密度比、静温比增大而增大时总压损失亦随之增大。
But total pressure loss increases with the increasing of the velocity difference accompanied with the increase of the density and the static temperature ratio.
与倾斜式结构相比，直线式结构截止阀在全开位置具有更高的压差(压力损失)。
The full open position in straight pattern globe valves has higher differential pressure (pressure losses) than an oblique pattern valve.
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