flexible automation valve controller is introduced as previously discussed, flexible Industrial Valves is at the top of the control valve, it is equipped with a flexible process sensor system. Flexible system is based on micro processor controller, it can provide the machine process control, diagnosis, and safety management. Through the sensor installed on the valve body in the process input to the flexible system will process, as shown in figure 6. 4. This system also has internal sensor to monitor the valve stem position and the pressure on both sides of the pneumatic actuators.

sensor on the controller and process control valve, single loop control is the simple definition of a when send information input sensor to the controller, the controller to send out a correction signal to the terminal control unit to the right place. Through monitoring the upstream pressure, downstream pressure, overflow and the valve stem position, flexible system can calculate the flow rate of valve. And compare it with predetermined set point and adjust position of any necessary to provide the correct flow rate. Flexible production system can have graphics to handle the pressure difference, the upstream pressure, downstream pressure, temperature, flow rate, stem location or other auxiliary loop single loop control process. For flexible system can program to deal with the machine control and measurement technology, Dcs can be used to deal with another more need to control in the factory or provide the total process supervision function. For the machine controller, flexible system can monitor and the establishment of the upstream pressure, downstream pressure, differential pressure, processing temperature and the rate of callus. Flexible system controller can be equipped with PID control, it USES from the external transmitter or within the process parameters of the value as control variables. In order to more effectively in the widely used process control, can make the process be tuned. Flexible system can be used with digital or reliable die locator both analog or digital system ( Figure 6. 5) 。

they can use 4 ~ 20 ma analog signals, digital signals or by programmable set point to operation in response to the PD. Spirit words sometimes raise to use personal computers or DCS system to set up the parameter and tuning and flexible operation of the valve as a - But some newer versions are equipped with a dashboard can be directly on the keyboard of the operation. Account for the user can use flexible system pass many operator interface to communicate: DCS input/output interface card, hand stand and recorder or personal computer. When using a personal computer through the spirit words system calls, you must install the software interface ( The factory equipped with) 。

process sensor and control valves is very adjacent controller greatly less salty dead time or lag time, significantly increased the response to technological change. When the flexible system including digital locator, greatly reduced the hysteresis, linearity and repeatability. Flexible system can collect and release flow and process data and sent to the DCS. DCS to provide customers with the current process technology analysis. Remote sensor can also be connected with flexible system to improve other process parameters of control. Don't have these data by DCS.

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