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.
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主要技術(shù)性能 Main Technical Performance
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適用范圍：Applicability
105～10-2Pa
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
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主要零件材料 Materials of Main Parts
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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）
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外形及連接尺寸（mm）（JB919） Overall and Connection Dimensions（mm）
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