Divide into control consultation
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Everyone, I would like to ask something. In proportional control, a pressure control valve is assumed. Main valve A: FC SP1450kpa, H1650kpa, L1300kpa; it operates at 0～50%. Auxiliary valve B: FO SP1550kpa, H1650kpa, L1300kpa; valve B operates at 50～100%. The corresponding currents are 4-12mA and 12-20mA. So, do the current levels of 4–12 mA and 12–20 mA correspond to the pressure range that can be adjusted by the valve? For example, 50% of H1650kpa and L1300kpa is 1475kpa. So can it be understood that when the pressure is between 1300-1475kpa, valve A operates, while when the pressure is between 1475-1650kpa, valve B operates? Please help to answer this. Thank you!
When the main valve opening is 0~50%, valve A operates at 100%~0; when the main valve opening is 50~100%, valve B operates at 0~100%. Is that correct?
Those in the instrumentation field should know this; what the original poster understands is, in my opinion as someone from the process engineering field, correct.
No problem; it’s step-controlled, with one controller corresponding to two valves