It is used to control delivery pressure only.

它只能用来控制输出压力.

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Essentially balanced single seat minimizes a variation in delivery pressure resulting from a varying inlet pressure.

基本平衡单阀座最大限度减小进口压力变化对输出压力的影响.

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Thus, frequent adjustment of the control knob is required to maintain constant delivery pressure.

因此经常要调整控制钮,以维持恒定的输出压力.

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