Laboratory sintered (fritted) filters — Porosity grading, classification and designation
NORMA vydaná dňa 1.10.1980
Označenie normy: ISO 4793:1980
Dátum vydania normy: 1.10.1980
Počet strán: 7
Približná hmotnosť: 21 g (0.05 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy 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.