How to determine the split point in a split-control system
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How to determine the split point for split-control? Purpose: to control the inlet pressure of a reciprocating compressor. One valve is a return valve, and the other is an inlet vent valve. The normal control pressure is 0.84. How should this split-control be set up?
The split control points need to be determined based on specific process requirements.
Split-control valves are divided into those with both valves in the same direction (both FC or both FO) and those with the valves in different directions (one FC and one FO). Splitting is further categorized into single-point splitting (the splitting signal point is at one location), overlapping splitting (the splitting area has an overlapping region), and dead-zone splitting (the splitting area has a dead zone). When two valves are operated in the same direction with a split range, it is necessary to ensure a smooth transition of the characteristics at the split point (so that the equivalent valve does not experience any distortion in its characteristics). The specific details depend on the operating conditions.
For example, how do I set the pressure to 0.85? ? ?