| 摘要 |
A valve which may be used to monitor its own performance and generate control or data signals accordingly, has a valve chamber 1, a valve member 5 movable within the chamber 1, means 6,7 for moving the valve member 5 between operative positions and including sensing devices 16,18,19, such as position, temperature and pressure sensors, and a micro-processor 14 mounted in or on the valve and connected to the sensing devices 16,18,19. The micro-processor is programmed to monitor the performance of the valve on the basis of the input data provided by the sensing devices and provide performance data and/or warning signals and/or control signals on the basis of the input and calculated data. Sensing devices may also be provided for sensing other process parameters and feeding the data to the microprocessor 14. The micro- processor 14 may also be programmed to apply control measures to the operation of the valve, and to display the fact that it had done so, in the event of particular sensed or calculated parameters falling outside a predetermined range. <IMAGE> |
