Gravity filling is the most basic way of filling. Gravity filling machines have a simple design and operation that allows them to function with little maintenance. The highest, central component of the machine is the supply tank. At every receptacle filling point, filling stems are connected to the bowls lower part.
The filling bowl has a vent tube that projects upwardly to a point above the liquid level. To begin the filling process, the platform raises the container until it comes into touch with the filling stem.
After that, the platform raises the receptacle against the stem, which opens the filling valve. The liquid flows into the receptacle when the filling valve is open. The air in the receptacle escapes through the vent tube and into the area above the filling bowls liquid. Despite the fact that the container is nearly full, the liquid continues to pour in.
The surplus liquids accumulate until it achieves the same elevation as the liquid level in the bowl in the vent tube. There is no spillover of liquid from the containers into the bowl since the vent tube reaches beyond the liquid level in the bowl. If the substance is frothy, the froth will rise beyond the liquid level in the bowl in the vent tubing.
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As a result, gravity fillers are rarely utilized in foamy products. The container is descended from its filling position and the filling valve is closed at a specified time after it has been full. Several methods are used to evacuate liquid that has accumulated in the filling stem from the vent tube.
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