Applications:
　　electric high vacuum butterfly valve uses device to drive the stem and disc to perform open and close action. It is used to put through or cut off the airflow in vacuum pipeline. Applicable medium can be pure air and noncorrosive gases.
Technical Data:
Fluid：gas、water、stream、acid liquid more
Leak rate：≤1.0×10^-6Pa·L/s；
Operating pressure：1.0×10^-6Pa～1.6×10⁶pa；
Working temp.：-50℃～+150℃；
Materials: SS304、SS316L
Sealing element:：FKM、NBR、VITON、EPDM
PipeConnection：flange
Electrical data:
Voltage: DC24V、AC110V、AC220V、AC440V
Electric locator: Input4-20mA signal,regulating action
Electrical connection: Connecting box type (popular type),
electric cable lead wire type (explosion-proof)
Protection class: German standard DIN43650A(IP67)
Other functions: E explosion-proof (explosion-proof rank ExdIIBT4)
Figure Structure：