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Disposable Masks

CHOOSING THE CORRECT MASK:
P1 is the rating given to a respirator which meets AS/NZ1716:2003 for filtering mechanically generated particles, eg. Particles formed by crushing, grinding, grilling, sanding and cutting. 
P2 is the rating given to a respirator which meets AS/NZ1716:2003 for filtering mechanically and thermally generated particles, eg. those from welding fumes. Also rated for protection from mists and abestos fibres. 
WHEN SHOULD I CHANGE MY DISPOSABLE MASK? 
Disposable masks are designed to last for a maximum of an eight hour shift, however, in hot, dusty, humid conditions, or where the wearer is removing or adjusting the mask frequently,the EFFECTIVE life of the mask will be much reduced. 
REPLACE THE RESPIRATOR WITH A NEW ONE IF 
• The respirator is removed in a contaminated area; 
• Excessive clogging of the respirator causes breathing difficulty; 
• The respirator becomes damaged; 
• The smell of vapours becomes apparent. 
A mask should fit snugly for the entire shift. If not, the mask should be replaced. 
WHY CHOOSE AN EXHALATION VALVE? 
An efficient exhalation valve minimises heat and moisture build up, particularly in hot and humid conditions.