The high vacuum flapper valve is used to connect or cut off the air flow in the vacuum pipeline. The applicable medium is pure air and non corrosive gas. According to the shaft seal structure, high vacuum flapper valve can be divided into GD-J rubber shaft seal and GD-J (b) bellows shaft seal. According to the conduction form, GD-J is the angle type, and GD-Sis the tee type with pre extraction.
Material Of Main Parts
Valve body, bonnet and stem: aluminum alloy, carbon steel or stainless steel
Seals: NBR, Viton, bellows (shaft seal).
Applicable scope of main performance indexes
1×10-6Pa～1.2×105Pa(bellows seal)
1×10-5Pa～1.2×105Pa(fluorine rubber ring seal)
Differential pressure on valve plate when opening:
≤1.2×105 Pa Arbitrary direction
Leakage rate of valve body and valve seat: ≤1.3×10-7Pa·L·s-1
Recommended number of cycles before first maintenance:The 200000 times
Baking temperature of valve body: ≤150℃
Installation location
-Manual drive: any
-Pneumatic drive: any
-Electromagnetic drive: any (bellows seal); seal face to vacuum (fluorine rubber ring seal)
Power Supply
-Pneumatic drive: AC220V 50Hz，6W Or DC24V，3W(special specification can be customized)
-Electromagnetic drive:AC220V OR 230V 50Hz，Starting power 800W、Maintain power 8W
Compressed air (pneumatic only):0.4～0.7MPa
Valve Opening And Closing Time
- Pneumatic drive: ≤1s
- Electromagnetic drive:Open≤0.1s；
Close≤1s(fluorine rubber ring seal)
Close≤0.5s(bellows seal)
Valve position indication
-Manual drive: with opening and closing position indication
-Pneumatic drive: with opening and closing position indicator switch (magnetic switch)
-Electromagnetic drive: with on position indicator |