Mini-CIP Flow Rate Calculations
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The objective of this slide is to apply the information from the previous lecture to provide understanding of the important CIP parameters for cleaning vessels and lines.
- The Tank, having a diameter of 1.5 feet, will be sprayed at 2.5 Gpm/Ft Circumference, equivalent to 12 Gpm.
- The simple static ball spray was drilled for 12 Gpm at 15 Psi, this pressure being more than adequate to assure spray stream reach in a small tank.
- The Tygon Flexline to be cleaned in combination with the tank, has a diameter equivalent to 1″ StSt tubing and thus requires, per lookup table, 9.0 Gpm to provide a velocity of 5 Fps.
- It was determined via experimentation at PDA that a Peristaltic Pump speed setting of 3 would pass approximately 3.0 Gpm, hence a delivery rate of 15 G Gpm to simultaneously spray the tank at 12 Gpm and continuously pass a low flow through the tubing.
- At one minute intervals the demonstration incudes (a) opening the filter vent for a few seconds to remove accumulated air from the housing, and then (b) changing the speed of the pump to 7 which provides a flow of 5 Gpm and demonstrates the ability to move air bubbles downwards through the 1″ Flexline, thus assuring solution contact with all surfaces.