INTEGRITY TEST METHOD FOR POROUS FILTERS

摘要

A method for testing the integrity of a filter comprising porous filter material having a bubble point, the filter having an expected specific liquid flow value, the method comprising: providing a filter fixture with an inlet for fluid flow and outlet for fluid flow; installing said porous filter in the filter fixture between the inlet and the outlet; wetting the porous filter material to fill the pores of the material with a wetting liquid; filling the filter fixture between the porous filter media and the fluid outlet with a liquid, pressurizing the filter fixture by providing gas at the fluid inlet of the filter fixture at a pressure lower than the bubble point of the filter, measuring the liquid flow out of the filter fixture.