Valve actuators 江苏兰 valve General Equipment Co., Ltd. is to achieve programmable valves, automation and remote control devices indispensable driving, its operation can be stroke, torque or axial thrust to control the size, with a small, easy to operate characteristics, and can meet the needs of a variety of control. Electric actuators for hand - electric switching mechanism: semi-automatic switch, lever handle switch required manual, the manual for the state to run automatically when electric. Structure shown in Figure 7. It consists of a handle, the switching member, the upright bars, clutch, spring and other components. When valves and actuators require handwheel operation, push the handle to the direction of the electric drive unit manually switch the clutch pieces elevation, and compression spring. When the handle pushed to a certain position, the clutch that is out of engagement with the worm gear and hand wheel, and stand upright pole worm end face torsion effect BARS, prop clutch will not fall, you can let go of the handle switch is complete, use the hand wheel operated . The required electric operation, the motor will drive the worm gear is rotated, the upright bars supported on the end face of the worm wheel, i.e., fall, quickly moving the clutch to the worm wheel under spring action direction, and engages with the worm wheel drive with the system, simultaneously with the hand wheel is disengaged , automate manual conversion to electric state.江苏兰 valve General Equipment Co., to make it easier to centralize control of coal mine drainage valve automation systems, the company on the basis of KXBC series on the development of a control KXBC series one, a three flameproof control valve actuators control box. Control box in addition to ensuring proof exterior design performance, but also has to prevent misuse of the mechanical and electrical interlock function commissioning 2 3.4 Digital Display Calibration: After more than commissioning is complete, turn off electric devices in place, then the output current of 4mA, Digital calibration press back button "RESET", then "0%" button to make the calibration memory, the display shows this case "L" flashes; the electric device to open in place, then the output current of 20mA, press the number significant scaling back button "RESET", then "100%" button to make the calibration memory, display "H" flashes on the display at this time. 3.5 Remote Control: local / remote switch play to the remote end can be remotely controlled. Within 3.5.1 for DC24V, shown in Figure 6, the remote end only provide passive contact, as shown to the implementation of remote on and off control (Note: The remote access point is not to keep inching opening and closing valve control). 3.5.2 External supply DC24V, DC24V remote side to provide power supply 24V- public terminal connected to the terminal "DC24V- output" side, power supply 24V + are access "Remote Open", "Remote Close", "Remote Hold" to achieve opening and closing valve control (Note: The remote access point is not to keep inching opening and closing valve control). Valve actuator, the valve (certified), the drive is provided by 江苏兰 valve General Equipment Co., Ltd .. Jiangsu Lan valve General Equipment Co., Ltd. (www.lanfa.cn) Jiangsu Changzhou, control valve leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Jiangsu Lan valve leadership with the staff warmly welcome all inquiries negotiations to create a better future Jiangsu Lan valve.