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СЛОЖЕН EN - OK
RESPIRA TORY PROTECTION

FILTERING RESPIRATORY PROTECTION APR (AIR-PURIFYING RESPIRATORY PROTECTION)
When using filtering masks, one should know the proper type, characteristics, and composition of the hazardous substance in the surrounding environment.
There must be an adequate amount of oxygen in the inhaled air (at least 17% by volume). When using particulate filters, hazardous gases should not be
present; when using gas filters, particulates should not be present. In case both are present, a combined filter should be used. The most commonly used
filters are class ABEK filters, which protect against multiple hazards simultaneously due to their wide protective range. Based on EN 141, these filters cover
classes A, B, E, and K. The advantages for the user include a secure choice, no need for different combinations, and easy and cost-effective storage
maintenance.
RESPIRATORY FILTERS RELIABLE PROTECTION AGAINST GASES AND PARTICLES
The working lifespan of respiratory filters depends on usage conditions. For gas or combined filters used against gases, the filter’s “life” is determined by an
odor that irritates or can be sensed during breathing. Some filters have a specific maximum working time (CO filter media, combined filter 89 Hg/St). For
particulate filters or combined filters used against solid particles and dust, the working time is determined by an increase in breathing resistance. With a
combined filter, the dominant protective function determines the filter’s lifespan, and both criteria must be observed. Particulate filters should be used once
against radioactive contamination, spores, bacteria, viruses, and enzymes.
APPLICATION, MARKING

COLOUR
MARKING TYPE APPLICATION CLASS MAXIMUM PERMISSIBLE GAS CONCENTRATION STANDARD
1 ml m vol.
Organic gases and vapours
A 2 vol. EN 14387
(boiling point 65ºC) ml m
3 ml m vol.
1 ml m vol.
Inorganic gases and
B vapours (without CO), (e.g. 2 ml m vol. EN 14387
chlorine, H2S, HCN...)
3 ml m vol.
1 ml m vol.
Sulphur dioxide, acid gases
E 2 ml m vol. EN 14387
and vapours
3 ml m vol.
Ammonia and organic 1 ml m vol.
K compounds derived from 2 ml m vol. EN 14387
ammonia
3 ml m vol.
gr. 1 100ml/m3 max 40 min.
Organic gases and vapours gr. 1 500ml/m3 max 20 min.
AX (boiling point 65 C) of the low EN 14387
boiling point group 1 and 2 gr. 2 1000ml/m3 max 60 min.
gr. 2 5000ml/m3 max 20 min.
Nitrogen dioxide as NO, Maximum usage time
NO-P3
NO2, NOx 20 minutes
Maximum usage time
Hg-P3 Mercury vapours EN 14387
50 hours
CO* Carbon monoxide EN 14387
Reactor P3* Radioactive iodine EN 14387
Efficiency low
P Particulates (dust) Efficiency medium EN 143
Efficiency high
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