Laboratory sintered (fritted) filters — Porosity grading, classification and designation
NORM herausgegeben am 1.10.1980
Bezeichnung normen: ISO 4793:1980
Ausgabedatum normen: 1.10.1980
Zahl der Seiten: 7
Gewicht ca.: 21 g (0.05 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen ISO
Description / Abstract: Filters are graded according to their pore size index in one of the eight classes specified. This is applicable to laboratory filters made of glass, vitreous silica, ceramics, metals and plastic materials. Annex A specifies a method for determination of pore size index. Annex B and C concern with a procedure for assessing uniformity of filters and for determination of air permeability.