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郵編：201803
郵箱：497608423@qq.com
聯(lián)系人：陳先生
手機：13788988771
電話：86-0512-50333374
傳真：86-0512-50333374-808
地址：江蘇省蘇州市昆山市綠地大道1555號中科創(chuàng)新廣場
郵編：201803
郵箱：497608423@qq.com
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真空節(jié)流破壞閥,smc板材,smc氣動原件,KQZD10-03S一級經(jīng)銷商,*,歡迎選購
真空破壞閥（Vacuum Breaker Valve）是一種安全閥。主要用于容器或管道中，在管道或容器因系統(tǒng)運行或停止而產(chǎn)生負壓或真空逐步升高時，該閥能自動開啟，破壞真空效應，使管道及其它設備不至產(chǎn)生癟、凹裂等現(xiàn)象，以保護設備的安全。
發(fā)展歷史
*代氣壓式
原始的氣壓式真空破壞閥由于需要專門的氣源和直流設備，已逐步淘汰。
第二代電動式
第二代的電動式真空破壞閥同水泵同通電，斷電。一旦出現(xiàn)非事故的停電，此閥就能自動馬上打開，破壞虹吸，截斷水流，防止水流倒灌會產(chǎn)生主機的葉輪飛揚的事件。
此閥門關閉動力源是采用100%節(jié)能電磁鐵，工作電源是采用220V，50Hz，其維護工作電壓只要300毫安。能長時間工作，電磁鐵的溫升只要10K。開閥動力采用蓄能彈簧，能在2~5秒之間打開。還設有手動開閥、關閥的裝置。人工操作方便、安全系數(shù)大。
但由于此閥耗電且一旦其電路發(fā)生故障即*失效，所以也沒有*得到市場的認可。
第三代機械式
第三代真空破壞閥為機械式結構。在系統(tǒng)形成真空時由大氣壓力直接頂開擋板往系統(tǒng)加氣，迅速破壞真空，防止負壓危害。0.2bar的密封壓力保證了在系統(tǒng)正壓時*不滲漏。由于不需要耗電，使用壽命長，破真空及時而得到市場的*歡迎。
真空節(jié)流破壞閥,smc板材,smc氣動原件,KQZD10-03S一級經(jīng)銷商,*,歡迎選購
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