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供水管道中有些闸阀侧旁设有旁通阀,请问旁通阀的作用是什么?

问答题
2022-03-16 02:44
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正确答案
对于大于600毫米口径的闸阀在主阀侧旁设有口径80—100毫米的旁通闸阀,关闭管道闸阀时先关闭主阀,后关闭副阀;开启闸阀时先开启副阀,后开启主阀。这样在启闭闸阀时,可使水压波动缓慢,可减少闸板两侧压力差,使闸阀启闭轻便。

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