ESAB Sentinel A60 Air w/ EPR-X1 PAPR Parts FAQs
Spares for a powered air-purifying welding helmet system: filters, pre-filters, batteries, lenses, hose covers and comfort items, and how to pick the right ones.
How do I make sure a spare part fits my powered respirator and helmet?
Start with the data plate or label on the blower unit and the helmet, then the manual, which lists the parts that belong to that system. Compare the part number or marking on the old part with the new one, and check that the blower, filter, hose and helmet are meant to be used together. Makers generally state that only original or specified parts should be used with their respirators, because other parts may mean the protection level no longer meets the stated standard and may void the warranty.
If the markings are worn away or you are unsure, check with the supplier before buying rather than guessing from a photo.
How do I check the airflow and what does the alarm mean?
Check the airflow before every use, using the method in your manual. This is usually a flow indicator or meter supplied for the purpose, or a battery and flow status display on the blower, and the manual will also describe how to test the low-flow alarm. If the airflow is below the stated minimum, or the alarm does not work as described, do not use the unit until it has been put right.
An alarm while working means the unit can no longer hold the set airflow, often because of a clogged filter or a low battery. Leave the contaminated area at once, then change the filter or recharge or replace the battery in clean air. If the blower stops, do not carry on working: protection is reduced and carbon dioxide can build up inside the helmet.
What does a P3 particle filter protect against, and what does it not?
A P3 filter is a high-efficiency particle filter, which is the type normally used to deal with welding fume. It removes solid and liquid particles from the air passing through the blower.
It does not remove gases or vapours, such as those from solvents, degreasers or certain coatings. A particle filter must not be relied on for gas hazards, and if both particles and gas are present you need a suitable combined filter and a risk assessment. Check what contaminants are in your work area and the filter markings in the manual before choosing.
What is a pre-filter for, and when should I change it?
A pre-filter fits over or ahead of the main filter and collects the larger particles, so the main filter clogs more slowly. Makers state that it prolongs the life of the main filter, and a clogged filter also shortens battery run time because the blower has to work harder.
Change it when it looks dirty, discoloured or loaded with dust, or if it is damaged. There is normally no fixed number of hours, so use the manual and your own experience of how much dust and fume your work creates. Always refit any spark guard the system requires, because sparks can damage the filter.