Overview Q641F flange pneumatic valve is a rotary type valve angle of 90 °, the sealing performance, flow coefficient, flow resistance coefficient is small, simple structure, long life, easy maintenance. The actuator is equipped with a single and double acting sub-models. Products are widely used in system control chemical, petroleum, textile, electricity, food and pharmaceutical, refrigeration, paper industry. Q641 pneumatic valve is mainly used to cut off or turn on the line of medium, can also be used for regulation and control of the fluid, it is compared with other valves, has the following advantages. 1, fluid resistance, ball is the smallest of all the valves in the fluid resistance, even reduced diameter valve, the fluid resistance is quite small. 2, the stem thrust bearing friction torque is reduced, long-term operation can smooth flexible stem. 3, the valve seat sealing performance is good, the use of seals made of elastic material such as Teflon, the structure is easy to seal, and the ball valve sealing capability with the increase of the pressure of the medium increases. 4, valve stem seals and reliable, due to the rotation of the stem only for imitation shipped without doing the lifting movement, easy to damage the stem packing and sealing ability increased with increasing pressure medium. 5, because of Teflon and other materials have good self-lubrication, friction loss and a small ball, so ball long service life. 6, download style stem and stem head convex order to prevent stem spray, such as stem seal damage caused by fire, convex order and the body can also be formed metal contact, ensure stem seal. 7, anti-static function: Set between spring ball, stem, body, static electricity generated by the switching process can be exported. Actuator using the new series GT or AT pneumatic actuator, double acting and single acting (spring return), rack and pinion drive, safe and reliable; AW series of large diameter valves using pneumatic actuator fork-type transmission, structure reasonable, 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. The following accessories are optional accessory options, depending on the control and requirements: cut-off Accessories: single solenoid valves, double solenoid valves, limit switches back to the hearing. Modulating Accessories: Electrical locator, pneumatic positioner, electrical converters. Air-handling accessories: air filter regulator, air FRL. Manual agency: HVSD handheld agency