2) butterfly structure engineering environment analysis

butterfly butterfly plate installed on the diameter of the pipe direction. Cylindrical channels of pneumatic valve body, disc around the axis of rotation, the rotation Angle °? ° between ° rotating disk, pneumatic valves are open all licence conditions.
butterfly pneumatic valve has simple structure, small volume, light weight, only by a few parts. And simply rotate ° rapid opening and closing, easy to operate, and fluid control pneumatic valve has good function. Butterfly pneumatic valve in the fully open position, only when the disc thickness through the body's resistance to the flow direction of medium pressure drop through the pneumatic valves produced is small, it has good flow control characteristics. Seal butterfly type pneumatic valve and two sealing seal metal shell. Elastic sealing pneumatic valve, sealing ring to be set on the pneumatic valve body or attached to the edge of the disc.
metal sealing pneumatic valves generally live longer than elastic sealing pneumatic valve, but it is difficult to completely seal. Metal sealing can adapt high working temperature, elastic seal has the defect of being limited by the temperature.
if used as a flow control pneumatic valve requirements, main choice is the right size and type of pneumatic valve. Adjusting the structure principle of pneumatic valve especially for large diameter pneumatic valve production. Butterfly pneumatic valve not only in the oil, gas, chemical industry, water treatment, it is widely used in general industry, also for the cooling water system of thermal power plants.
the commonly used control pneumatic valve has the wafer butterfly valve and flanged butterfly pneumatic valve two kinds. Wafer butterfly valve pneumatic valve is pneumatic valve flange bolt connection between two tube, pneumatic valve is a bolted flanged butterfly on on the pneumatic valve flange on both ends of pipe flange connection method of pneumatic valve.