Issue of high-pressure control and lower selection for new hydrogen tank pressure control
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I would like to ask everyone: when the primary load value of my Hydrocom system is normal, it is determined by inverting the OP value of the high-pressure control valve PIC1061 as the primary load value. I would like to ask everyone: after the pressure in the new hydrogen tank decreases, the OP value of PIC1068 in that tank starts to decrease from 105, and it becomes smaller than the OP value set for high-pressure control. I’m not sure how the primary load changes under these conditions; thank you
Our unit is a diesel and gasoline hydrogenation unit
Is there a character limit? If I write too much, can’t it be posted?
In any case, a higher OD value results in a lower value for the first-level load, and both of these values decrease. When choosing a new hydrogen tank, the value of PIC1068 is directly used as the value for the first-level load; this value changes rapidly from 90. Will this have an impact on the machine?
Or logically speaking, the load value won’t immediately change from over 90 to a very low value
The PIC1068 is not involved in system pressure control; it merely regulates the pressure of D106. When the pressure exceeds the set value, it adjusts the pressure of D106 by venting. PIC1069 and PIC1091 are used to selectively increase the pressure for high-level control.
What is the setting value for the PIC1068?
I’m sorry, I was wrong; it’s the low-pressure selection control system for pic1069 and pic1061
Yes, the set value for pic1068 is 5.5MP； pic1069 set value 2.1MP
Two replace the regulator to output valve signals, and the low selector selects the lower signal. It belongs to reactive regulation.