@Little Inch - yes, makes sense. In this case the 50 psig is the battery limit pressure. Compressor suction is controlled by compressor PLC at 40 psig, meaning that if pressure is > or equal to 40 psig, the compressor is moving the flow corresponding to whatever pressure it has. If pressure...
What is meaning when Process Engineers say the a pressure of an equipment is floating on something?
For example if there is no pressure control on a vessel , is it meaning that its pressure is floating on some other equipment pressure? How is this terminology used in attached sketch situation...