The study to the effect of air flow rate controlling pneumatic system in a machine pouring raw milk into storage tanks

Abstract

The objective of this research is to study the air flow rate control of a pneumatic system of a machine that is used in the automatic pouring of raw milk into a storage tank. The study was used to setup the amount of air flow rate and the pressure to control the pneumatic system in the raw milk storage tank machine in order to operate without surges and to reduce losses while pouring raw milk in the collection process. The pneumatic system used a PLC control system . The experiment used water instead of raw milk (they are the same weight) in the 40 L storage tank and set the air pressure of the pneumatic system at 7 bar. The time for pouring the milk into the storage tank was set at 15 seconds and the air flow rate was controlled at 25%, 50%, 75% and 100% (by adjusting position of the control valve). It was found that the air flow rate in the control system affects the water pouring that can be obtained. When the position of air flow rate control valve was adjusted to low level, the raw milk storage tank machine can pour out the water with high efficiency because the water in the tank has no surges and splashes. Then, it was found that the time of pouring water completely is 14 seconds and the air flow rate control valve set at 25% causes the least water loss for this machine. This is a development in the automation of the raw milk processing system.

Keywords

• pouring machine
• raw milk
• automatic system