Catalytic spool valve
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In normal production, should the pressure difference control for each slide valve be on automatic control or manual control? Thank you!
We use manual control for the reaction temperature and the differential pressure of the regeneration slide valve; we employ automatic control for the reaction temperature
It is advisable to use pressure difference control for the regenerative feed valve, so as to provide a safeguard in case of an accident. The external circulation and double-acting slide valve can be controlled automatically, while the external heat extraction slide valve is preferably controlled manually.
We implement automatic control of the reaction temperature
Regenerative spool valves are generally used in low-select control circuits, right? Selective circuit design that automatically switches control based on the lower set value!
The reaction temperature is controlled by two control circuits: the high temperature level is controlled via the opening degree of the slide valve, while the low temperature level is controlled by the pressure drop; when the pressure drop falls below 15 kPa, the slide valve closes automatically
This post was last edited by h*ng on 2018-3-18 at 16:38. The reaction temperature is controlled automatically via the slide valve, while the pressure difference of the slide valve is controlled manually. If the pressure difference of the slide valve falls below 15 KPa, can it still automatically switch to low-pressure difference control to close the slide valve? Thank you!
No, we use cascade control for the reaction temperature and the spool valve opening; the pressure drop across the spool valve is controlled automatically, and it’s possible to set a lower threshold for this pressure drop. This is done for safety reasons, to prevent interference between the different systems
Won’t the spool valve be selected at a lower level when operated manually?