STANDARDS
EN 140 STANDARD - Half and quarter mask |
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Gas half masks marked EN 140 are devices designed to provide the user with protection if used together with gas filters, dust filters and combined filters; they are in compliance with all the requirements of the standard, such as respiratory resistance, adherence loss and carbon dioxide content of the inhaled air. |
EN 143 STANDARD - Dust filters |
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Dust filters are devices conceived to protect the users against:
They fully meet all requirements provided by the standard including breathing resistance, filter penetration, obstruction and mechanical resistance. Dust filters are classified also according to their re-usability during time and have the following markings:
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EN 14387 STANDARD - Gas filters and combined filters | |||||||||||
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Gas filters are devices conceived to grant to the user the protection against:
If air in work environment is contaminated not only by gases and vapours, but also by dusts with concentrations superior to TLV, it is necessary to use combined filters, made of filtering elements both gas and dust resistant, that in this way provide efficient protection also against dusts, fumes and mists. Filters marked EN 14387 fully meet all requirements provided by standard including breathing resistance, ability to protect against gases, filter penetration, obstruction and mechanical resistance.
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PROTECTION CATEGORIES OF GAS AND DUST FILTERS |
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PROTECTION CLASS | MAXIMUM CONCENTRATION OF TEST GAS | |
Class 1 | LOW FILTERING EFFICIENCY | 1000 ppm or 0,1% in volume |
Class 2 | MEDIUM FILTERING EFFICIENCY | 5000 ppm or 0,5% in volume |
Class 3 | HIGH FILTERING EFFICIENCY | 10000 ppm or 1,0 % in volume |
PROTECTION CLASS | NPF | MAXIMUM CONCENTRATION OF TEST AEROSOL |
P1 | 4 | 4 x TLV |
P2 | 12 | 12 x TLV |
P3 | 50 | 50 x TLV |
To define maximum contaminant concentration (theoretical) allowed in the workplace it is necessary to multiply the Nominal Protection Factor (NPF) by TLV. NPF is a value indicating the theoretical level of respirator protection and which indirectly expresses the value of filter efficiency to retain or not of airborne contaminants; TLV is a value indicating the threshold limit concentration of dangerous substances to which a worker can be exposed without suffering damage to health (prolonged exposure up to a work shift). For example, "12xTLV means that the mask P2 is suitable to protect the user in environments with a concentration of contaminant substance up to 12 times the allowed maximum.
REACH |
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In order to safeguard the consumers’ health, the European Union issued the REACH regulation (come into force on 1st June 2007) which forbids the use of certain chemicals. COFRA guarantees the compliance of all its products with the REACH regulation; they do not contain carcinogen substances or mentioned in the European list of forbidden substances and, in order to grant it, all raw materials used during production are subjected to controls. |
EN 149 STANDARD |
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The dust filtering half masks are devices suitable to protect the user against all the external agents which, if inhalated, can be a risk for health or safety. The respirators in compliance with EN 149 standard have been conceived to grant protection against aerosol both liquid and solid, that are:
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DOLOMITE DUST CLOGGING TEST |
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Optional test provided by the standard EN 149 measuring the performances of clogging resistance of a mask. The conformity to this test (which can be noticed with the “D” marking on the mask) guarantees a good level of breathability even in extreme cases of highly concentrated dust. |
FILTERING EFFICIENCY OF THE MASK |
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LEVEL OF PROTECTION |
FILTERING EFFICIENCY OF THE MASK |
FFP1 |
78 % |
FFP2 |
92 % |
FFP3 |
98 % |
The standard EN 149 provides for a test for determination of filtering efficiency which expresses the quantity of contaminant filtered by the masks in laboratory conditions.
MAXIMUM CONCENTRATION OF CONTAMINANT ALLOWED IN THE WORK ENVIRONMENT ACCORDING TO LEVELS OF PROTECTION |
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LEVEL OF PROTECTION | NPF | MAXIMUM CONCENTRATION OF TEST GAS |
FFP1 | 4 | 4 x TLV |
FFP2 | 12 | 12 x TLV |
FFP3 | 50 | 50 x TLV |
To define maximum contaminant concentration (theoretical) allowed in the workplace it is necessary to multiply the Nominal Protection Factor (NPF) by TLV. NPF is a value indicating the theoretical level of respirator protection and which indirectly expresses the value of filter efficiency to retain or not of airborne contaminants; TLV is a value indicating the threshold limit concentration of dangerous substances to which a worker can be exposed without suffering damage to health (prolonged exposure up to a work shift). For example, "12xTLV means that the mask FFP2 is suitable to protect the user in environments with a concentration of contaminant substance up to 12 times the allowed maximum.
REUSABILITY |
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The dust filtering half masks are classified according to their reusability over time and have the following markings:
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REACH |
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In order to safeguard the consumers’ health, the European Union issued the REACH regulation (come into force on 1st June 2007) which forbids the use of certain chemicals. COFRA guarantees the compliance of all its products with the REACH regulation; they do not contain carcinogen substances or mentioned in the European list of forbidden substances and, in order to grant it, all raw materials used during production are subjected to controls. |