Operating torque: Operation moment is to select the most important parameters of the valve electric device. Electric butterfly stroke during exercise by size, torque or axial thrust to control. Due to the operating characteristics of valve actuators and utilization depends on the type of the valve, the valve position device specifications and work on the pipeline or equipment, electric butterfly valve device is programmed to achieve the valve, automation and remote control devices indispensable. Therefore, the correct choice of valve electric device, to prevent the emergence of the phenomenon of overload (operating torque is higher than the control torque) is essential. Typically, the correct choice on the basis of electric butterfly valve device. The rubber elastomer butterfly in continuous use in electric butterfly valve flange, it will produce tear, abrasion, aging, wear polymer composites repair valve hole even wear off phenomenon. The conventional thermal curing process is difficult to adapt to the needs of the repair site, to be used when repairing specialized equipment, consume large amounts of heat and electricity, time-consuming and laborious. Today the gradual use of polymer composites alternative to traditional methods, which is the most widely blessing World Blue technology system. Its products have excellent adhesion and excellent abrasion resistance, tear resistance, to ensure that meet or exceed the restored parts of the life cycle of a new, greatly reducing downtime. Pneumatic Wafer butterfly valve _ _ out of Hong Kong, Shantou butterfly valve provided by the Hong Kong Science and Technology Co., Ltd., Dongguan Ming. Port Valve Co., Ltd., Dongguan Ming (www.gdmgfm.com) is Dongguan, butterfly leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the next port of the valve leading the staff warmly welcome all inquiries negotiations to create the next port of the valve a better future.