緩閉式止回閥當(dāng)管道停止供水時(shí)，若下游水開始回流，一部分回流水經(jīng)球閥進(jìn)入主控制室，由于單向閥作用，回流水不能從主控制室流出，引起主控制室逐漸升壓，緩緩關(guān)閉主閥。

緩閉式止回閥產(chǎn)品介紹：

300X緩閉止回閥是能夠調(diào)控啟閉速度的止回閥，在水泵啟動(dòng)或停止運(yùn)行時(shí)，可配合現(xiàn)場(chǎng)調(diào)節(jié)至*開啟或關(guān)閉速度。可用于高層建筑，減小水錘現(xiàn)象，以達(dá)到安全及安靜的啟閉效果。

緩閉式止回閥應(yīng)用范圍：

300X型緩閉止回閥產(chǎn)品廣泛用于高層建筑、生活區(qū)等供水管網(wǎng)系統(tǒng)及城市供水工程。

緩閉式止回閥工作原理：

當(dāng)閥門從進(jìn)口端給水時(shí)，水通過微型過濾器、針型閥、單向閥進(jìn)入主閥控制室，再經(jīng)過球閥排水至下游。因?yàn)獒樞烷y開度小于球閥開度，即主閥控制室的排水速度大于進(jìn)水速度，因此控制室壓力降低，作用于主閥盤下端的進(jìn)口壓力打開主閥向下游供水。
當(dāng)管道停止供水時(shí)，若下游水開始回流，一部分回流水經(jīng)球閥進(jìn)入主控制室，由于單向閥作用，回流水不能從主控制室流出，引起主控制室逐漸升壓，緩緩關(guān)閉主閥。

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