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。
公稱壓(Mpa) | 殼體試驗(yàn)壓力(MPa) | 密封試驗(yàn)壓力(MPa) | 適用介質(zhì) | 介質(zhì)溫度(℃) |
1.0 | 1.5 | 1.1 | 水 | 0-80 |
1.6 | 2.4 | 1.76 | ||
2.5 | 3.75 | 2.75 |
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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