What happens when the maximum allowable pressure drop of a filter is reached?

When the maximum allowable pressure drop of a filter is reached, it signifies that the filter has accumulated a significant amount of debris or particles, resulting in increased resistance to the flow of fluid. This situation leads to a condition where the filter no longer functions effectively at its intended level of filtration. As the pressure continues to increase, the differential pressure across the filter will cause the filter media to reach a threshold where it can no longer effectively trap particles.

Consequently, instead of ensuring clean fluid flow, the filter starts to allow some particles to pass through, which can lead to downstream contamination of the fluid system. This phenomenon is known as "breakthrough," and it indicates that the quality of filtration is compromised as larger or more numerous particles begin to move past the filter medium. This not only impacts the cleanliness of the fluid but can also potentially damage components downstream due to the presence of contaminants.

Understanding this dynamic is crucial in maintaining the efficiency and lifespan of hydraulic systems, as the integrity of the filter directly influences overall system performance.