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Filters, covers, lenses and wear items for a powered air-purifying welding respirator, and how to work out the right ones.
Filter life depends on how much fume or dust you work in and how hard you breathe, so there is no one fixed time that suits everyone. Most powered units have a built-in warning that tells you when the filters are becoming exhausted or clogged, and you should change them when it sounds or lights.If breathing feels harder, or the airflow seems weaker than normal, treat that as a sign the filter is blocked and change it. Also check the expiry date printed on the filter or pack, which must not be exceeded. Your manual and your risk assessment set the routine for your own workplace.
Replace a visor or cover lens as soon as it is cracked or damaged, because a damaged one can hide further cracks and may no longer protect your face or eyes. Keeping visors clean helps you spot cracks early.A helmet-style headtop should be replaced at the end of its service life, and it should be checked carefully after any heavy impact. If there is any damage or doubt, take it out of use and follow the maker's instructions on whether it must be replaced. Do not repair a damaged part with tape or adhesive.
A particle filter catches dust and fume, such as welding fume, but it does not remove gases or vapours. Gas filters are designed for particular gases, so they only help if they match the hazard you have identified.Filter colour bands show what a filter protects against. Particle filters are white and marked P. Brown, grey, yellow and green bands cover different groups of gases and vapours, and combined filters carry more than one band plus a class number. For welding, which filter you need depends on the process, the metals and fumes involved and your risk assessment, so check this before you buy.
Tight-fitting masks rely on a seal against the skin, so the wearer must be face-fit tested and clean shaven where the seal sits. Facial hair and stubble can let contaminated air leak in.A powered respirator with a loose-fitting hood or helmet does not rely on a face seal in the same way, and is often used by people who cannot pass a fit test or who have a beard. Check your own unit's manual to confirm it is a loose-fitting type and what it requires. Your employer's risk assessment still decides what is suitable.
Not necessarily. The HSE's welding guidance puts controlling fume at source first, usually with local exhaust ventilation, and uses respiratory protection where that cannot adequately control exposure. Outdoors, where extraction is impractical, suitable respiratory protection is needed.For longer welding jobs the HSE points to battery-powered air-fed equipment with a minimum assigned protection factor of 20. Whether your equipment meets that is shown in the maker's marking and manual. Replacement parts must keep the unit within its approval, so use only what the maker specifies.
Start with the data plate on the blower unit and the manual: they give the model or type, and the manual lists the approved filters, covers and other parts. Compare the part number or marking on the old part with what you are ordering.Use only replacement parts specified by the maker. Substituting unapproved filters, seals or other parts can reduce the protection the unit gives and may invalidate its approval. If the part number is worn off, our team can help you match it from the unit details.