以下为句子列表：
英文: As the pressure on diaphragm (8) approaches a balance with the force exerted by adjusting spring (5), disc (20) is throttled to a position where just enough water flows to maintain the set delivery pressure.
中文: 当隔膜(8)上的压力接近等于调节弹簧(5)的弹簧力时，阀瓣(20)就进行节流状态，使得刚好有足够的水流来保持设置的输出压力。
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