... hugo-valve.com, spring return wafer butterfly valve, pneumatic actuated lug butterfly valve manufacturers and suppliers in China and ... at your service. Pneumatic actuated wafer butterfly valve Description 1, pneumatic actuated wafer/lug butterfly valve is composed with ... Class125, Class 150 Standard : ANSI,DIN,JIS End Connection: Wafer,lug Operate: double acting Pneumatic and single acting ( spring ...