["灰水泵の出口方向阀が戻らない\n", "灰水泵一备一开。运行为切至备用泵后"原运行泵由于方向阀结垢不能完全回座而无法投入自启备用（出口阀一打开泵就倒转）"私当单向阀是夹管式的"请问各位海友厂家的灰水泵出口方向阀的形式是什么样的？听说有的厂家用的是旋启式"一般能用两年左右\n", "灰水の硬度大 "通过单向阀的结构来选择止回阀的结构"夹管式的蝶式止回阀吗 "需要考虑现场水泵的流量及及提升高度"防止水锤现场\n", "你现在用的蝶式双瓣止回阀吗\n", "试著调查下 "看看看看其他厂家的止逆阀结构形式"没事按照计划倒泵 "不要长时间不倒泵导致结垢关不住"

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