Low selection control
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What does catalytic low selection control of PZI and PIK mean? How is dual-acting spool valve regulated? Thank you!
Automatic control: select the path with the lower value and use it for control
On one path it is the differential pressure of two instruments; what is it on the other path?
The other parameter is the regenerator pressure; under normal conditions, low regenerator pressure is selected for control, which is achieved through a double-acting slide valve
Could you explain in detail exactly how the lower selection is made? Thank you!