The greatest experience and know-how, as well as one of the
widest filter ranges in the market make MSA filters the first choice
for users in all industries.
The high-performance particle filter P3 PlexTec and the combination
filters use the PlexTec Media to provide even better comfort
for the user. MSA PlexTec is based on a particle filter element with
a significantly increased filtering surface. The reduction in inhalation
resistance improves filtering performance and service time,
while at the same time allowing slightly more relaxed breathing.
Additionally, using PlexTec Technology, filter housings have been
reduced in size, being now more compact and lightweight.
The most frequently used filters are of the ABEK type, which
protect against many hazards at the same time, due to the wide
range of protection that they provide.
Based on EN 14387, these filters have an application range
designat ed by the code letters A, B, E and K. Benefits for the user
include: safe selection, no mix-ups, economical procurement,
High-grade multiple range filters have an even greater sphere of
application, as e. g. the combined filter 93 ABEK CO NO Hg/St or
93 A2B2E2K2 Hg/St.
The 9X series of MSA gas and combination filters are in full compliance
with the REACH regulation and do not include any toxic
materials listed in the European Regulation.
Respiratory filters protect against numerous known con t aminants
which, if inhaled, can be dangerous to health: toxic gases, vapours
and particles, as well as many combinations with immediate or
delayed harmful effects.
Requirements for Selection
The efficacy of filters designed to provide respiratory protection is
dependent on the ambient atmosphere.
The oxygen content of the inhalation air must be sufficient,
at least 17 vol.%!
Type, properties and composition of the hazardous agent in the
ambient air must be known. Material Safety Data sheets may
contain this information.
Local regulations concerning the use of filtering devices, the
request ed oxygen content and the threshold limit values may
differ and must always be observed.
When using a particle filter, no hazardous gases may be present
in the ambient air, when using a gas filter no hazardous particles.
In case of doubt a combined filter must be used.
Filtering devices must not be used in confined spaces such as
containers, canals, etc. due to poor ventilation.
Only filters with a weight of up to, but not exceeding, 300 g may
be used on quarter and half face masks. Only filters with a weight
of up to, but not exceeding, 500 g may be used on full face masks.
Never use filters that show signs of damage.
If you are in doubt concerning any of the above-mentioned points,
or if you believe that the composition of your atmo sphere at work
has changed, use protection that operates independently of the
ambient air. MSA provides you with a wide range of breathing
apparatus and airline devices.
For factory sealed and properly stored gas and combined filters the
following storage lives can be expected:
Filters type A, AX, B, E, K, Hg, Reactor: 6 years
Filters type CO, NO: 4 years
Particle Filters: 10 years
Proper storage conditions are indicated on the filter packaging.
The expiration date is marked on the individual filters. Gas and
combined filters that have been opened must be replaced after
6 months at the latest, or earlier if they are exhausted.
The expiration of the service life of gas filters can be detected by
odour or tasted on the clean air side. The filters must then be
The expiration of the service life of particle filters or combined filters
that are used against particles can be detected by an increase in
With combined filters - depending on the predominant protective
function - both criteria must be observed. Particle filters must only
be used once against radioactive contaminants, spores, bacteria,
viruses and proteolytic enzymes.
Some filters have a specified maximum service time (CO filter cart -
ridges, combined filters 93 Hg/St) or they have an incorporated
warning system (CO filter canisters).
Filters that are used against hazardous gases whose infiltration
cannot be detected by odour, taste or irritation, are subject to
special regulations concerning duration and usage that depend on
the conditions of use. Otherwise a form of protection that functions
independently of the ambient air must be used.
Further conditions of use in each individual workplace and of each
user affect the service life of respiratory devices:
Pace of breathing - the higher the rate of breathing the higher the
contamination rate of the filtering device
Temperature of the ambient air - the higher the temperature,
the shorter the service life
Humidity- the higher the humidity the lower the intake capacity
of activated carbon against organic gases and vapours
Mixtures of hazardous agents - less absorbent components in
the activated carbon can be replaced with components that offer
higher rates of absorption (desorption)