All filters cleaned by PPSL are fully tested and the results compared with the "as new" technical specification published by the filter manufacturer. Bubble Point Testing is undertaken as standard:The cleaned filter is submersed in alcohol and plugged. Air pressure through the filter is increased gradually and the back pressure is recorded at the point when the first bubble appears through the media. Essentially this test provides an indication of the largest pore size of the filter that can then be compared to the manufacturers specification.
Visit the PPSL Precision Processing Services Ltd website for more information on Bubble Point Testing