How can the clogging extent of a filter element be discerned?

The most effective method for determining the clogging extent of a filter element is by measuring the drop in hydraulic pressure. This approach utilizes the principle that as a filter becomes clogged with particles and contaminants, it restricts the flow of fluid passing through it. When the flow is impeded, there is an increase in the pressure upstream of the filter and a corresponding decrease in pressure downstream. By measuring the difference in pressure across the filter, you can assess how much it is clogged; a significant drop in pressure indicates a higher level of clogging, while minimal drop suggests that the filter is relatively clean.

This method is quantifiable and provides a clear numerical value that can be used to determine the filter's condition, making it much more reliable than subjective measures such as visual inspection, color checking, or noise production. These alternative methods may not accurately reflect the level of contamination within the filter and might lead to premature replacement or continued use of a filter that should be changed. Therefore, pressure measurement is a standard practice for accurately assessing filter clogging and ensuring reliable operation.