DYC-JQ型電磁真空壓差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，閥門利用大氣壓力使閥板自動關閉，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。適用介質為凈空氣和非腐蝕性氣體。 ■ 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. ■ 主要技術性能 Main Technical Performance ■ ■ ■ 　適用范圍：Applicability 　105～10-2Pa 　閥門漏率：Valve Leak Rate 　≤1.3×10-2Pa.L/S. 　適用溫度：Applicable Temperature 　-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 隔膜：丁腈橡膠加滌綸綢 Body, bonnet and disc: carbon steel or aluminium alloy Diaphragm: NBR and terylene silk CONSTRUCTION FIGHTS (mm) ■ 外形及連接尺寸(mm) Overall and Connection Dimensions(mm) ■ 活套法蘭連接(GB6070　圖一) Model 型號 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 ■ 快卸法蘭連接(GB4982 圖二) Model 型號 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 ■ 方體螺紋連接(JB919 圖三) Model 型號 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-J