NS EN 1822-4:2009现行
High Efficiency Air Filters (epa, Hepa And Ulpa) - Part 4: Determining Leakage Of Filter Elements (scan Method)
出版：Norwegian Standards (Norges Standardiseringsforbund)
专家解读视频
Describes a procedure for the determination of the efficiency on the basis of a particle counting method using an artificial test aerosol, and allows a standardized classification of these filters in terms of their efficiency.
NEN EN 1822-4:2009 - Identical
NF EN 1822-4:2010 - Identical
UNI EN 1822-4:2010 - Identical
SS EN 1822-4 Ed. 2 (2009) - Identical
ONORM EN 1822-4:2000 - Identical
SN EN 1822-4:2000 - Identical
UNE EN 1822-4:2001 - Identical
NBN EN 1822-4:2000 - Identical
BS EN 1822-4:2009 - Identical
SN EN 1822-4:2010 - Identical
ONORM EN 1822-4:2012 - Identical
NBN EN 1822-4:2010 - Identical
UNE EN 1822-4:2010 - Identical
DIN EN 1822-4 : 2011 - Identical
I.S. EN 1822-4:2009 - Identical
DIN EN 1822-4 E : 2011 - Identical
