In the course of the current pandemic of COVID-19 affecting all countries worldwide, an
increased global demand for air filters have been observed. To ensure security of supply for
certain air filters where we see a particularly high demand we change the in-process integrity
test from Water Intrusion Test to Diffusion and Bubble-Point testing after wetting the filters
with an IPA/Water solution at our production site in Yauco, Puerto Rico. The change is as follows:
For this filter element the bubble point measured was ≥ 1.0 bar/ 14.5 psi. (Wetting agent: Isopropanol/ water, 60/ 40 Vol%).
All established integrity testing procedures for Sartofluor airfilters in our production site in
Göttingen, Germany remain unchanged. More about the change, as well as the products to which it applies, read in the official document.