1 Introduction wearable pneumatic pneumatic butterfly valve D671X Zhengzhou by rubber sealing butterfly valve plate and carbon steel or stainless steel, stem composition. Temperature such as food, pharmaceutical, chemical, petroleum, power, textile, paper and other water supply and drainage, gas pipes for regulating traffic and closure of media role ≤120 ℃ apply. 2 Features an innovative design, reasonable, unique structure, light weight, open and close quickly. 2, the operation torque is small, easy to operate, energy smart. 3, can be installed in any position, and easy maintenance. 4, the seal can be replaced, reliable sealing performance bi-directional sealing reach zero leakage. 5, sealing material aging, corrosion resistance and long service life. 3 standard design standards: GB / T2238-1989 flange dimensions: GB / T9113.1-2000; GB / T9115.1-2000; JB78 length of the structure: GB / T12221-1989 pressure test: GB / T13927-1992; JB / T9092-1999 4 actuators using the new GT Series pneumatic actuators, double acting and single acting (spring return), gear, safety and reliability; AW series of large diameter valves using pneumatic actuator fork-type transmission reasonable structure, the output torque, a double acting and single acting. 1, gear dual-piston, output torque, small size. 2, the choice of aluminum alloy cylinder material, light weight, beautiful appearance. 3, at the top, bottom installation manual operating mechanism. 4, rack connection opening angle can be adjusted, the rated flow. 5, the actuator feedback signal indicating an optional live and all kinds of accessories to automate operations. 6, IS05211 standard provides a convenient connection to install the replacement product. 7, both ends of the adjusting screw allows the sections of standard products at 0 ° and 90 ° has an adjustable range of ± 4 °. Ensure the accuracy of synchronization with the valve