GUQ series pneumatic vacuum ball valve is applicable for ... off the pipelines in the vacuu GUQ Series Pneumatic Vacuum Ball Valve GUQ series pneumatic vacuum ball valve is ... below table for the main technical performance & parameters of GUQ pneumatic vacuum ball valves.se Main technical performance(Picture ... flange(KF)connection and outline dimension(GB/T6070) GUQ Series Pneumatic Vacuum Ball Valve