GD型高真空挡板阀用于接通或切断真空管路中的气流。适用介质为净空气和非腐蚀性气体。高真空挡板阀按轴封结构可分GD-J型橡胶轴封和GD-J(b)型波纹管轴封两种。按通导形式可分GD-J为角通型式，GD-S为带预抽口的三通型式。 ■ GD High Vacuum Flapper Valve ■ GD high vacuum flapper valve is used to put through or cut off the airflow in vacuum pipeline. Applicable medium can be pure air and noncorrosive gases. According to its shaft seal structure, high vacuum flapper valve is classified into GD-J rubber shaft seal type and GD-J(b)bellows shaft seal type. According to its put-through type, it is classified into GD-J angle type and GD-S three-way type with prepumping. ■ 主要技术性能 Main Technical Performance ■ ■ ■ 　适用范围：Applicability 　105～1.3×10-4Pa(轴封为橡胶) 　105～1.3×10-5Pa(轴封为波纹管) 　阀门漏率：Valve Leak Rate 　≤1.3×10-4Pa.L/S.(轴封为橡胶) 　≤1.3×10-5Pa.L/S.(轴封为波纹管) 　适用温度：Applicable Temperature 　-25～ 80℃(丁腈橡胶) 　-30～ 150℃(氟橡胶) ■ 主要零件材料 Materials of Main Parts ■ ■ 阀体、阀盖、阀杆：铝合金、碳钢或不锈钢 密封件：丁腈橡胶、氟橡胶、波纹管(轴封)。 Body, bonnet and stem: aluminium alloy, carbon steel or stainless steel Sealing element: NBR, Viton, bellows(shaft seal) CONSTRUCTION FIGHTS(mm) ■ 外形及连接尺寸(mm) Overall and Connection Dimensions(mm) ■ 快卸法兰连接 Model 型号 DN D1 D A H P 法兰标准 GD-J10(b) 10 12.2 30 40 124.5 60 GB4982 GD-J16(b) 16 17.2 30 40 124.5 60 GD-J25(b) 25 26.2 40 50 134.5 78 GD-J32(b) 32 34.2 55 58 153 78 GD-J40(b) 40 41.2 55 65 160.5 78 GD-J50(b) 50 52.2 75 70 203 78 ■ 活套法兰连接 Model 型号 DN D1 Do D2 A P H n-φc Dny预抽口 法兰标准 GD-J50 50 110 90 55 70 78 203 4-φ9 GB6070 GD-J63 63 130 110 68 88 160 380 4-φ9 GD-J80 80 145 125 85 98 160 400 8-φ9 GD-J100 100 165 145 105 108 160 420 8-φ9 GD-J(S)160 160 225 200 165 158 160 575 8-φ11 DN40 GB4982 GD-J(S)200 200 285 260 208 200 160 655 12-φ11 DN50 GB6070 GD-J(S)250 250 335 310 258 208 250 690 12-φ11 DN63 GB6070 GD-J(S)320 320 425 395 328 250 250 785 12-φ14 DN80 GB6070 GD-J(S)150 150 220 195 156 158 160 575 8-φ12 DN40 GB4982 JB919 GD-J(S)30