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產品說明   服務承諾   訂貨流程   上海吉邁閥門制造有限公司主要生產≦DDC-JQ型－電磁真空帶充氣閥≧也是國內真空閥門生產商之一。公司經營范圍:閥門,管件,流體設備的生產，加工，銷售，管道配件，建筑材料，五金交電，自控設備的銷售，從事貨物及技術的進出口業務！歡迎新老客戶來電，來函，我們將竭誠為您提供滿意的服務！ DDC-JQ型－電磁真空帶充氣閥 DDC-JQ型電磁真空帶充氣閥是機械真空泵安全閥，安裝于機械真空泵的進氣口，并與泵同步開啟和關閉。當泵停止工作或電源突然中斷時，閥門自動關閉。使真空系統保持真空并將大氣充入泵腔內，從而避免泵油逆向流動而污染真空系統。適用介質為純凈空氣和非腐蝕性氣體。 DDC-JQ Electro-vacuum Charging Valve DDC-JQ electro-vacuum charging valve is a safety valve for vacuum, pump. It is mounted at the intake nozzle of vacuum pump, synchronously opened and closed with the vacuum pump. In case that vacuum pump stops working or power supply is suddenly broken off, valve will be cosed automatically to keep the vacuum system vacuum and the air charged into the cavity of vacuum pump, thus to prevent pump oil from reverse flow that can pollute the vacuum system. Applicable medium can be pure air and noncorrosive gases. 主要技術性能 Main Technical Performance 　適用范圍：Applicability 　10510-2Pa 　閥門漏率：Valve Leak Rate 　≤6.7×10-3Pa.L/S. 　適用溫度：Applicability 　-30+50℃ 　線圍溫升：Coil Temperature Rise 　≤65℃ 　開閉時間：Open-close Time 　≤3S 　電源電壓：Mains Voltage 　220V/50Hz 主要零件材料 Materials of Main Parts 閥體、閥蓋、閥板：碳鋼或鋁合金 密封圈：丁腈橡膠 Body, bonnet and disc: carbon steel or aluminium alloy Seal ring: NBR CONSTRUCTION FIGHTS(mm) 外形及連接尺寸(mm)(JB919) Overall and Connection Dimensions(mm)