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GD
High Vacuum Baffle Valve
GD high vacuum flapper valve 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. |
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Main Technical Performance |
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| Vacuum Range： |
105~6.7x10-4Pa(sealing of shaft is NBR or Viton)
105~6.7x10-6Pa(sealing of shaft is Bellows) |
| Valve Leak Rate： |
≤1.3x10-4 Pa.L/S(sealing of shaft is NBR or Viton)
≤1.3x10-6 Pa.L/S(sealing of shaft is Bellows) |
Applicable Temperature： |
-25~+80℃(NBR）-30~+150℃(Viton） |
| Mounting state： |
Any |
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Materials of Main Parts |
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Body, bonnet and stem: aluminium alloy, carbon steel or stainless steel
Sealing element: NBR, Viton, bellows (shaft sealing) |
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| Overall and Connection Dimensions (mm) |
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