A pneumatic wafer type butterfly valve (www.klevalve.com) Overview D671 pneumatic wafer type butterfly valve (www.klevalve.com) the use of sophisticated J-shaped flexible ring and three eccentricity metal hard sealing multi-layered structure, is widely used The medium temperature ≤ 425 ℃ metallurgy, electric power, petrochemical, as well as drainage and municipal construction and other industrial pipe for regulating the flow and set off fluid use. The valve uses three eccentric structure, seat and disc sealing surface plate are made of stainless steel with different hardness and has good corrosion resistance, long life, the valves are bi-directional sealing function, valve products meet national GB/T13927-92 Pressure test standards. Second, pneumatic wafer type butterfly valve (www.klevalve.com) Features 1, the valve seal structure with three eccentric, seat and disc almost no wear, with more and more tightly sealing function concept. 2, seals made of stainless steel production, with a metal seal and seal the dual advantages of flexibility, both in the case of low and high temperatures, both with excellent sealing performance, corrosion resistant, long life and other characteristics. 3, the disc plate sealing surface using welding cobalt-based alloy, the sealing surface wear resistance and long service life. 4, large-sized butterfly plate with truss structure, high strength, over-flow area, small flow resistance. 5, the two-way valve has a sealing function, the installation from the media flow restrictions, are not subject to impact of spatial location, may be installed in any direction. 6, the drive can be multi-position (rotated 90 ° or 180 °) to install, easy to use. Three, D643H flexible metal sealing butterfly valve pneumatic actuators using the new GT series pneumatic actuators, a double acting and single-acting (spring return), gear transmission, safe and reliable; large diameter valves used AW series pneumatic actuator fork type transmission, reasonable structure, large output torque, a double acting and single-acting one, gear dual-piston, the output torque, small size. 2, the cylinder used aluminum alloy material, light weight, beautiful appearance. 3, can be at the top, bottom mounting manual operating mechanism. 4, rack connection opening angle can be adjusted, the rated flow. 5, the optional electric actuator feedback signal indication and various accessories to achieve automation. 6, IS05211 standard connection for the installation of the product provides a convenient replacement. 7, both ends of the pitch adjustment screw allows standard products between 0 ° and 90 °, with adjustable range of ± 4 °. Ensure the valve synchronization accuracy. Four, D643H aeroelastic metal sealing butterfly valve attachment options and requirements under different control following optional accessories: cutting type accessories: single solenoid valve, double solenoid valves, limit switches back to the hearing. Modulating Accessories: Electrical locator, pneumatic positioners, electrical converters. Air source treatment accessories: air filter regulator, air source treatment FRL.