Gi-a series high vacuum butterfly valve is used to connect or cut off the air flow in the vacuum pipe. The valve plate of the valve adopts the clamping structure to clamp the sealing ring of the valve plate, which has the function of fine adjustment of the main sealing, and the opening and closing of the valve has the function of locking.
The applicable working medium is air and non corrosive gas.
| applicability（Pa） | 105~1.3×10-6 |
| Valve leak rate（Pa.L/S) | ≤1.3×10-7 |
| Applicable temperature（℃） | -25~+80（sealing material is NBR） |
| -30~+150（sealing material is fluororubber） | |
| Material of main parts of valve | Stainless steel or carbon steel |
| Flange standard | GB/T6070 |
| Installation position | arbitrarily |
| model | Drift diameter（DN） | ΦD | ΦB | H | A | L | n-ΦC |
| GI-50A | 50 | 110 | 90 | 84 | 26 | 130 | 4-Φ9 |
| GI-63A | 63 | 130 | 110 | 94 | 32 | ||
| GI-80A | 80 | 145 | 125 | 107 | 154 | 8-Φ9 | |
| GI-100A | 100 | 165 | 145 | 117 | |||
| GI-125A | 125 | 200 | 175 | 136 | 35 | 197 | 8-Φ11 |
| GI-150A | 150 | 225 | 200 | 150 | |||
| GI-200A | 200 | 285 | 260 | 188 | 45 | 242 | 12-Φ11 |
| GI-250A | 250 | 335 | 310 | 220 | 50 | 330 | |
| GI-300A | 300 | 425 | 395 | 263 | 55 | 12-Φ14 | |
| GI-400A | 400 | 510 | 480 | 320 | 60 | 435 | 16-Φ14 |
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