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| Respiratory protection Sperian Protection against gas/fumes: Class 1: for gas contents of less than 0.1% by volume Class 2: for gas contents of between 0.1% and 0.5% by volume Class 3: for gas contents of between 0.5% and 1% by volume Protection against particles, dust and aerosols: Class 1: (P1 or FFP1) to protect against large solid particles with no specific toxicity (calcium carbonate). Class 2: (P2 or FFP2) against solid aerosols and/or liquids indicated as hazardous or irritants (silicone – sodium carbonate) Class 3: (P3 or FFP3) against solid aerosols and/or toxic liquids (beryllium – nickel – uranium- exotic woods) |
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