Peter Nachtwey said:Darrenj, yur pump still looks awfully big even if it supplies other tanks. Do you know the formula that relates power to flow and pressure?
Air activated valves will also add a lot of lag to the process. Have you considered an electric solenoid valve with LVDT feedback?
You can't P gain you way out of a PID problem. The P gain can only be increased so much. After a point the settling time can not be decreased. This limit on the effectiveness is dependent on the system.
Where is the trend? A trend is worth a lot more than 1000 words. It can save big $$$$.
Have you considered using a variable bias or feedforward?
Peter.. The pump mentioned (10HP) is only for the cleaning of tank..for the rest of the 20 odd hours it is a different pump that is programmed to supply the machine with 15PSI of milk..I am trying to set my system up on the worst case..I will know where i stand tommorow night..Hell this set up might not work..if not its back to the drawing board but i feel i should try every thing possible before i tell them its not going to work the way they want..