What happens when total system resistance is equal to applied pressure?

When total system resistance is equal to the applied pressure, it signifies a balance in the system between the force driving the beer through the lines and the resistance encountered along the path, such as from friction in the lines, the elevation of the beer, and any restrictions in the flow path.

In this scenario, the beer will flow steadily at a rate that matches the applied pressure, which can be quantified, such as at 1 gallon per minute. This occurs because the energy supplied by the pressure is exactly sufficient to overcome the collective resistance, allowing for a constant flow rather than an interruption.

While the resistance does not exceed the applied pressure in this case, beer continues to move, reflecting a steady state of flow that can be maintained as long as system conditions remain constant. If any changes occur, such as an increase in resistance or a decrease in applied pressure, it could lead to different outcomes like reduced flow or complete stoppage.