Where does air enter?
Review the supply tank, connections, return path and the way liquid enters the container. Air already present in the product and foam generated during filling are different issues.
Assess the fill profile
Product-specific fast/slow stages, controlled shutoff and, where useful, nozzle movement may be assessed. Settings are established with the actual product and container.
Verify quantity independently of foam
Visible foam height may not represent net quantity. Review the selected measurement, residual flow and the result after settling together.
Plan the whole cycle
Settling, closing and transport time must be included in complete-line output. The filling instant alone cannot define the line rate.