The control valve for the bypass of the high-temperature heat exchanger. Why is there a limit? What purpose? It has no impact. Thank you!
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The control valve for the bypass of the high-temperature heat exchanger. Why is there a limit? What purpose? It has no impact. Thank you!
Is the bypass high-temperature steam? Could it be that the temperature isn’t sufficient? There are too few conditions to make an accurate analysis.
It’s either about oil products, and the temperature at the reaction inlet can be adjusted usually. There are many control valves that have a limit – even when you set them to zero, they still remain at 10% open
There are various reasons related to the characteristics of this process; for example, the materials used in this process tend to solidify, crystallize, and cause blockages easily, so it is necessary to maintain a continuous flow within the pipelines to ensure process safety； Or exceeding temperature and pressure may occur when the valve opening reaches a certain value ； It may also be necessary to ensure the temperature of materials on the back route, etc.
The installation of a limit switch on the control valve generally means that it is not allowed to close while the valve is functioning properly, thereby ensuring the continuity of the medium flowing in the backstream