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MERCANTA The following chart helps to choose the correct type of respirator: Classification explained: APF = Assigned Protection Factor When correctly used by a wearer who has passed a face fit test, an FFP1 respirator should reduce exposure to airborne particles by a factor of 4, an FFP2 by a factor of 10 and an FFP3 by a factor of 20. 2.0 Filter Masks These air purifying devices consist of a face piece and an exchangeable filter. They are provided for use in atmospheres not immediately dangerous to life. This means the hazardous atmospheres may produce physical discomfort immediately, chronic poisoning after repeated exposure, or acute adverse physiological symptoms after prolonged exposure. The approval requires the use of the proper filter type. Face pieces are available either as half masks, or as full face masks. Full face masks are used where eye, face and respiratory protection is required at the same time. Filter masks can be used for working or for retreating from hazardous atmospheres. CAUTION: Filter masks must not be used inside enclosed and confined spaces, such as containers, sewers, silos, tanks, mines, pipelines, hoppers or well shafts. In case of high oxygen-deficiency or very high concentration of toxic substances, respiratory protection devices that are environment-independent have to be used. Also, in atmospheres where the concen- tration and the identity of the hazard are unknown and generally when the concentrations are greater than those for which the respirator is marked or regulations permit, filter masks must not be used. Do not use filter masks in firefighting operations! ➤ Advantages lightweight, low prime costs, no restrictions in mobility ➤ Disadvantages ➣ filter masks are air purifiying devices. Designed solely to remove specific contaminants from the air, it is essential that their use is restricted to atmospheres which contain sufficient oxygen to support life (at least 17 % vol) and which contain generally not more than 2 % concentrations of toxic gases and vapours by volume ➣ the composition of the hazard must be known for an effective choice of filters ➣ limited service and shelf life 2.1 Half Masks ➤ Advantages ➣ more comfortable than full face masks ➣ unobstructed view ➤ Disadvantages ➣ will not fit all faces, therefore effective sealing is difficult ➣ no eye protection CAUTION: Half mask respirators with class 1 filters should not be used in concentrations of contaminant above 1000 ppm unless oth- erwise stated by the manufacturer. FFP1 Respirators FFP2 Respirators FFP3 Respirators Speciality Respirators Protection factor APF4 APF 10 APF 20 APF 4 or 10 Typical applications Low level fine dust/oil or water based mists (hand sanding, drilling and cutting) Moderate level fine dust/ oil or water based mists (plastering, sanding and wood dust) Higher level fine dust/ oil or water based mists (hazardous pharmaceutical powders, biological agents and fibres) Fine dust/oil or water based mists. Options for metal fume, ozone and nuisance levels of cer- tain gases and vapours dependent on model Easy identification Identified by YELLOW straps or noseclip Identified by BLUE straps, noseclip or valve lettering Identified by RED straps, noseclip or valve lettering Protection level can be identified by the strap colour or valve lettering Valve selection Unvalved disposable or valved Unvalved disposable or valved Valved or cup-shaped valved Unvalved or valved Main applications Sanding, drilling, cutting, laboratory work, odours Plastering, cement, woodworks, grinding Pharmaceutical industry, chemical industry, petrochemical industry, where no gases are involved Spray painting, welding, nuisance odours 45

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