Hunan KWANG Automation Technology Co., Ltd. Agency Metso positioner, conventional models have a lot of cash. Flowserve locator, ABB positioner, ABB inverter, ABB gauge, ABB flowmeters, Metso dissolved meter, limit switches Metso, Metso ball. Contact: Xu Yi 18073173363 QQ 946289802 company's official website www.hunanzh.com Metso Locator Performance Introduction 1: compressed air and environmental requirements for the use of compressed air and a lower environmental requirements; if Locator inlet water, no Influence locator use; supply pressure range greater 1.4Bar-8bar, adaptability; gas path portion using a slide valve. Air filtered into the interior by the second slide valve spool even dirty, can be cleaned continue to use a clean, easy to maintain; 2 ,: process connection using H-type electrical connection between positioner and actuator cylinder, connection strong, minimal hysteresis, accurate positioning control error and dead small; 3: pneumatic spool valve size of the connection of the positioner can choose according to the size of the actuator, so that different sizes of valves have good response consistency, improve dynamic characteristics of the valve; 4: Structure and vibrations models can be used for single and double acting, spare parts compared; modular design and fewer parts, vibration and better; 5: spare parts slide valve assembly is removably cleaning, other modules (such as coils, nozzles bumpers, etc.) can independently demolition and replacement; 6: Actual valve opening shell hardware design by the Executing Agency fed back through the front-end processing circuit to the microcontroller, the microcontroller and this signal is provided given valve opening compared to get the valve opening change rate deviation deviation through our algorithm processing, the device will emit a certain width of the pulse signal to control the actuator depending on the results of algorithms. Meanwhile, the LCD module will set the actual valve opening and valve opening is displayed, the microcontroller through F S485 communication interface to transfer data to the host computer. Power supply module to the microcontroller and external devices respectively 5V and 12V voltage. Keyboard module main function is to set the valve opening. The alarm module will be more than 9% of the entire valve stroke or less than 1% during the whole trip and microcontroller fault alarm when the relevant operators. The remote control module is designed to avoid the inconvenience of climbing the operator. The entire circuit embodiment, the actual valve opening sensor fed back 4 ~ 20mA of current through the resistor into a voltage conversion, and then through a filter capacitor, and finally into the LM258 voltage follower voltage from the regulator role, and finally input to the microcontroller The PA0 mouth. Since 4 ~ 20mA of current through the resistor conversion is unable to reach 0 ~ 5V voltage, which causes the valve opening feedback inaccurate affect control. So we applied between microcontroller port and power PA1 a potentiometer in the program where we can value minus the value of the PA0 PA1 mouth, so that we can get more accurate valve opening. 2) Power module design: ATmega16 need some peripherals needs 5V supply voltage 12V supply voltage to the input supply voltage transformer treated here with a special chip LM317. Voltage across the transformer into a + 12V and an output voltage of + 5V.