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European regions Filtration
Guide Safety Filtration Guide - Europe and Other Regions

Indications for the choice of respiratory protection devices are based on current knowledge. Before each use of the ELIPSE respirator devices, the buyer and user must ensure that the masks and filters used are those specified for the type of pollutant and its concentrations. The ultimate responsibility concerning selection and use of products lies solely with the buyer and user.

TYPES OF FILTERS
Dust filters are able to retain airborne particulates and are offered in various constructions, which enhance the filters characteristics with use of various types of filter material with different thickness, porosity and surfaces, to protect against particulates, gases and nuisance odours. Activated carbon cartridge filters contain specific activated carbon, which retain certain gases and vapors by adsorption, while combined filters can remove both gases, vapors and particulates.

TECHNICAL CHARACTERISTICS OF FILTERS
There are various types of particulate dust filters which have different filtration efficiency. Depending on which you choose, you can have the most suitable means of protection against environmental pollution conditions. The airborne particles are retained by the filter by means of mechanical and/or electrostatic action. In the case of gas filters, substances are retained by the chemical-physical action of activated carbons in the filter, able to adsorb and neutralise contaminants. It is assumed that the efficiency of gas and vapor interception on adsorbent material is 100%, at least until the completion of the capacity of the filter material. For gas filters, we refer to; time to completion or, rather, the period beyond which the filter is saturated and the pollutant begins to pass through the filter. This 'breakthrough' time depends on the quantity of adsorbent material used, on its filtration capacity against the pollutant and on environmental concentrations.

Protection against particulates (dust, mists and toxic fumes)

Dust: dust forms when a solid material is broken down into tiny fragments. The finer the dust, the higher the risk.

Mists: mists are tiny droplets that are formed from liquid materials by atomisation and condensation processes, such as spray painting.

Fumes: fumes are formed when a solid material is vaporised by the high heat. The vapor cools quickly and condenses into very fine particles.

Respiratory filters have 3 classes of protection with increasing efficiency, normally expressed with a Nominal Protection Factor (NPF) which is the ratio between concentration of the contaminant in the environment and inside the mask. The resulting factor indicates how many times the device can reduce the external concentration.

Classes of efficiency of dust respirators

P1 (Facial Anti-Dust Filter class 1) 80% filtration : 4 (NPF)
P2 (Facial Anti-Dust Filter class 2) 95% filtration : 10 (NPF)
P3 (Facial Anti-Dust Filter class 3) 99,95% filtration : 40 (NPF) Anti-dust filters are distinguished by the colour WHITE

Protection against gases and vapours

Gases and vapours: gases and vapours are molecules, so small that they penetrate particulate filters. You need to use a chemical filter against these. Anti-gas respirators have activated carbon filters which, for physical or chemical adsorption, withhold the harmful substances that are distinguished by identifying letters and colours:

Type Protection Class

A organic gases and vapours with a boiling point above 65°C
B inorganic gases and vapours (excluding carbon monoxide)
E acids / acid gases
K ammonia and organic ammonia derivatives
AX organic gases and vapours - boiling point <65°C

There are three protection classes for each type of anti-gas filter, depending on the amount of contaminants that the filter is able to adsorb. The choice is therefore determined by the predicted concentration of the pollutant:

Class 1 is low capacity and can be used until 1.000 ppm
Class 2 is medium capacity and can be used until 5.000 ppm
Class 3 is high capacity and can be used until 10.000 ppm

Combined filters (gas and dust), besides the colour of the specific gas/es, include a white band and their marking show all the distinctive letters with their relative efficiency classes.

Filter Life: Filter life depends on a number of variable factors; the wearer’s breathing rate, the characteristics and level of contaminant, length of time a user is exposed to a contaminant, and environmental conditions such as temperature and humidity. Saturated or used filter cartridges will leak trace amounts of contaminant to the wearer, which may be detected via odour, taste, and irritation. If a contaminant is detected filters should be changed immediately.

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