Filtration efficiency of liquid filter bags
Filtering: absolute filtering is the filter surface interception, more than 95-99.9% particles of a certain size is smaller than the size of the particles to intercept all through. The size of the filter material surface must be the same size, fiber weaving must be tight and firm, the material after jointing requirements can withstand greater pressure, in order to prevent leakage occurs, strictly guarantee the absolute filtration effect.
Usually used for depth filtration had a bag of polypropylene, polyester, NOMEX, Teflon and other materials, the material internal structure, the thickness of the non-woven filter materials, the surface of the fiber will have an impact on the interception efficiency of depth filtration. Usually, this filter is also called relative filtration, and the filtering accuracy is usually defined by the filtration efficiency of impurities of an aperture. Different companies on the filter bag accuracy testing methods and the required filtering efficiency is not the same, some are defined as 80~85%, and some are defined as 50~70%.
The filtration efficiency of liquid filter bags is divided into relative filtration and absolute filtration.Relative filter: deep filter is to filter the way to intercept the filter layer on the surface and internal, non-woven (also called non-woven) in non woven fiber irregularly intertwined, large particles was first intercepted in the non-woven fabric outside, smaller penetration into it, but to a certain depth and were intercepted further smaller impurities, finally is smaller than a certain size larger than the size of particles and small particles.
