GD-J/S型高真空檔板閥 GD High Vacuum Flapper Valve
GD型高真空擋板閥用于接通或切斷真空管路中的氣流。GD-J/S型高真空檔板閥適用介質為純凈空氣和非腐蝕性氣體。高真空檔板閥按軸封結構可分GD-J型橡膠軸封高真空檔板閥和GD-J(b)型波紋管軸封高真空檔板閥兩種。高真空檔板閥按通導形式可分GD-J為角通型式高真空檔板閥，GD-S為帶預抽口的三通型式高真空檔板閥。
GD high vacuum flapper valves 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.
主要技術性能 Main Technical Performance
適用范圍：Applicability 105～1.3×10-4Pa(軸封為橡膠) ; 105～1.3×10-5Pa(軸封為波紋管)
閥門漏率：Valve Leak Rate ≤1.3×10-4Pa.L/S.(軸封為橡膠) ; ≤1.3×10-5Pa.L/S.(軸封為波紋管)
適用溫度：Applicable Temperature -25～+80℃(丁腈橡膠) ; -30～+150℃(氟橡膠)
主要零件材料 Materials of Main Parts
閥體、閥蓋、閥桿：鋁合金、碳鋼或不銹鋼Body, bonnet and stem: aluminium alloy, carbon steel or stainless steel
密封件：丁腈橡膠、氟橡膠、波紋管(軸封)。Sealing element: NBR, Viton, bellows(shaft seal)
外形及連接尺寸(mm) Overall and Connection Dimensions
快卸法蘭連接
| Model 型號 | DN | D1 | D | A | H | P | 法蘭標準 |
| 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 |
活套法蘭連接
| Model 型號 | DN | D1 | Do | D2 | A | P | H | n-φc | Dny預抽口 | 法蘭標準 |
| 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)300 | 300 | 380 | 350 | 308 | 250 | 250 | 785 | 8-φ14 | DN80 GB6070 | JB919 |