Thread Content
The intelligent valve positioner is an intelligent field instrument. Thanks to the use of microprocessors and advanced control components, it makes it easier to calibrate the valve positioner, and its range of applications has been greatly improved. Its main features include: 1) Simple installation and flexible configuration; it can be configured via software to achieve various functions such as automatic zero-point adjustment, automatic modification of control parameters for indication and alarm purposes, travel limitation, and multi-stage control. It also allows for easy setting of the directional operation and flow characteristics of the control valve. 2) Low air consumption: The nozzles and baffles in traditional electrical valve positioners are components that consume air continuously, whereas smart valve positioners use pulse piezoelectric valves to replace the traditional nozzle and baffle system. Pulse piezoelectric valves not only enable a more precise and faster control method, but also remain in a gas-free state for most of the time, releasing gas only when the intelligent valve actuator reduces its output. 3) It features intelligent communication and on-site display functions, facilitating on-site maintenance and calibration. 4) The intelligent valve positioner can be installed separately from the control valve (traditional valve positioners need to be installed closely with the actuator). 5) Non-contact position sensors are used in place of traditional valve position switches, making it easier to use them in harsh environments such as those with high temperatures or radiation. 6) It has a self-diagnosis function: it can not only diagnose faults in the intelligent valve actuator itself, but also assess the performance of the control valve body and the actuator. 7) For safety instrumented systems that have extremely strict requirements regarding the operation of control valves, intelligent valve positioners offer very convenient functions for safety testing and trial operation. Schematic diagram of the separate installation of intelligent valve positioners: see the original link for details: https://www.sohu.com/a/307647625_120129629?sec=wd