GI high vacuum valve GI high vacuum valve for switching on or off the airflow in vacuum. Applicable medium can be pure air and non-corrosive gases. Main technical performance Scope: Applicability 105 ~ 1.3 × 10-4Pa valve leak rate: Valve Leak Rate ≤1.3 × 10-4Pa.L / S Temperature:. Applicable Temperature -25 ~ + 80 ℃ (nitrile rubber) -30 ~ + 150 ℃ (Viton) Mounting orientation: Mounting Direction major parts of any material body, bonnet, Stem: carbon steel or stainless steel seals: NBR, FKM. Overall and connection dimensions (mm) Model Model DN D Do D1 BH B1 L n-φc GI-32 32 78 64 36 22 32 36 115 4-φ7 GI-40 40 85 70 44 22 40 36 115 4-φ7 GI-50 50 110 90 55 22 50 36 115 4-φ9 GI-65 65 125 105 70 26 130 38 135 4-φ9 GI-80 80 145 125 85 30 140 38 135 4-φ9 GI-100 100 170 145 105 30 153 38 135 4-φ12 GI-150 150 220 195 156 35 179 40 165 8-φ12 GI-200 200 275 250 208 40 208 40 185 8-φ12 GI-250 250 330 300 258 45 234 45 300 8-φ14 GI-300 300 380 350 308 55 300 55 350 8-φ14 GI-400 400 500 465 408 60 340 60 500 8-φ18