進口真空電磁閥
進口真空電磁閥產(chǎn)品概述
美國沃克(WORK)是安裝在機械式真空泵上的閥門。閥門與泵接在同一電源上,泵的開啟與停止直接控制了閥的開啟與關閉。當泵停止工作或電源突然中斷時,閥能自動將真空系統(tǒng)封閉,并將大氣通過泵的進氣口充入泵腔,避免泵油返流污染真空系統(tǒng)。真空電磁閥適用的工作介質(zhì)為空氣及非腐蝕性氣體。
工作原理
常閉:當線圈通電時,先導閥芯吸合,先導孔打開,閥上腔卸壓,活塞靠下腔介質(zhì)壓力推動,電磁閥打開。
當線圈斷電時,先導閥芯靠彈簧復位,先導孔關閉,閥上腔由活塞節(jié)流孔增壓和復位彈簧的推力,電磁閥關閉。
常開:當線圈通電時,先導閥芯靠彈簧復位,先導孔關閉,閥上腔由活塞節(jié)流孔增壓和復位彈簧的推力,電磁閥關閉。
當線圈斷電時,先導閥芯靠彈簧復位,先導孔打開,閥上腔卸壓,活塞靠下腔介質(zhì)壓力推動,電磁閥打開
主要技術(shù)參數(shù)
詳細參數(shù):http:///cn/products/534.htm
公稱壓力:105~10-2Pa
閥門漏率:≤6.7×10-3Pa.L/S.
適用溫度:-30~+50℃
線圍溫升:≤65℃
開閉時間:≤3S
電源電壓:220V/50Hz
閥體、閥蓋、閥板:碳鋼或鋁合金
密封圈:橡膠
公稱通徑:DN15-100mm
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