DYC-JQ型－电磁真空压差阀     ■ DYC-JQ型电磁真空压差阀是机械真空泵安全阀，安装于机械真空泵的进气口，并与泵同步开启和关闭。当泵停止工作或电源突然中断时，阀门利用大气压力使阀板自动关闭，使真空系统保持真空并将大气充入泵腔内，从而避免泵油逆向流动而污染真空系统。适用介质为纯净空气和非腐蚀性气体。
■ DYC-JQ Electro-vacuum Differential Pressure Valve     ■ DYC-JQ electro-vacuum differential Pressure valve is a safely valve for mechanical vacuum pump. It is mounted at the intake nozzle of mechanical vacuum pump, synchronously opened and closed with the pump. In case that pump stops working or power supply is suddenly broken off, valve disc will be closed automatically under atmospheric pressure, to keep the vacuum system vacuum and the air charged into pump cavity, thus to prevent pump oil from reverse flow that can pollute the vacuum system. Applicable medium can be pure air or noncorrosive gases.
■ 主要技术性能 Main Technical Performance     ■ ■ ■ 　适用范围：Applicability 　105～10-2Pa 　阀门漏率：Valve Leak Rate 　≤1.3×10-2Pa.L/S. 　适用温度：Applicable Temperature 　-30～+50℃ 　线围温升：Coil Temperature Rise 　≤65℃ 　开闭时间：Open-close Time 　≤3S 　电源电压：Mains Voltage 　220V/50Hz
■ 主要零件材料 Materials of Main Parts     ■ ■ 阀体、阀盖、阀板：碳钢或铝合金 隔膜：丁腈橡胶加涤纶绸 Body, bonnet and disc: carbon steel or aluminium alloy Diaphragm: NBR and terylene silk
CONSTRUCTION FIGHTS (mm)
■ 外形及连接尺寸(mm) Overall and Connection Dimensions(mm)
■ 活套法兰连接(GB6070　图一)   Model 型号 DN Do D D2 n-φc A H DYC-JQ50 50 90 110 55 4-φ9 70 203 DYC-JQ63 63 105 130 68 4-φ9 88 226 DYC-JQ80 80 125 145 85 8-φ9 98 260 DYC-JQ100 100 145 165 105 8-φ9 108 282 DYC-JQ160 160 200 225 165 8-φ12 158 350	■ 快卸法兰连接(GB4982 图二)   Model 型号 DN D1 D A H B DYC-JQ16 16 17.2 30 40 160 55 DYC-JQ25 25 26.2 40 50 170 60 DYC-JQ32 32 34.2 55 58 179 60 DYC-JQ40 40 41.2 55 65 187 70 DYC-JQ50 50 52.2 75 70 203 85	■ 方体螺纹连接(JB919 图三)   Model 型号 DN Do D2 h B H n-d DYC-JQ16 16 42 22 28 48 148 4-M5 DYC-JQ25 25 55 29 35 58 155 4-M6 DYC-JQ32 32 64 36 40 68 160 4-M6 DYC-JQ40 40 70 44 44 80 166 4-M6 DYC-JQ50 50 90 55 56 94 189 4-M8 DYC-JQ65 65 105 70 65 115 205 4-M8 DYC-JQ80 80 125 85 75 140 250 4-M8