Nominal pore size rating describes the ability of the filter to retain the majority of the particles at the rated pore size and larger (60-90%).
Glass fiber filters and screen filters are a good example of nominally rated filtration.
Absolute size rating describes the pore size at which a challenge organism of a particular size will be retained with 99.9% efficiency
under strictly defined test conditions. Most membrane filters are rated as absolute terms.
What is the difference between nominal and absolute pore size ratings?
Thursday, September 04, 2014 09:36:04
Posted in Membrane filter By