ESAB Sentinel A50 Air w/ EPR-X1 PAPR Parts FAQs
Spares and consumables for a powered air-purifying respirator welding helmet system: filters, batteries, chargers, cover lenses, magnifying lenses and comfort items.
How do I work out which spare part fits my helmet and blower unit?
Start with the data plate, the instruction manual and the part number on the item you are replacing. A powered helmet system has two halves, the helmet with its auto-darkening filter and the blower unit with its filters and battery, and each half has its own parts list. Make sure you identify which half the part belongs to.
The HSE advises that replacement parts are ideally sourced from the original manufacturer of the equipment, so the kit keeps working as intended and gives the protection stated. Parts that look alike can differ in size, fit or filter performance, so match the part number, not the appearance. Our team can help you match a part if you send the number.
What is the difference between the pre-filter, the main particle filter and the spark arrestor?
A blower unit usually has a main particle filter and a pre-filter. The main particle filter is the part that removes welding fume and dust from the air you breathe. The pre-filter is normally a coarser layer that fits over or in front of it and catches larger material, which tends to extend the life of the main filter, especially when grinding.
Some units also have a spark arrestor, a screen that stops hot particles reaching the filter, but not all do, so check your manual. The layout varies, so follow it for the order of the parts and the correct way round. Fit only the parts the maker lists for your blower.
How do I know when to change the PAPR filters?
Follow the maker's instructions first, because the interval depends on the filter and the work. The HSE says particle filters become clogged and make breathing difficult, and recommends changing them when they are damaged, visibly contaminated or harder to breathe through, and never after the shelf-life date. Marking the fitting date on the filter is good practice.
Powered units usually give an alarm for low airflow, which often means a clogged filter, and a low battery alarm. Pre-filters generally need changing more often than the main filter. If an alarm sounds, leave the work area and fix the cause before carrying on.
Can I use a different battery or charger with my blower unit?
Only use the battery and charger the maker specifies for your unit. A maker's manual for a comparable powered respirator warns that its lithium-ion battery may only be charged with the original charger, because other chargers can cause serious injury. Check that the mains supply matches the charger, and use a charger meant for your battery type.
Charge in a safe, dry location away from the welding area and sparks, within the temperature range in the manual, and not in direct sunlight. If a battery gets abnormally hot, swells or is damaged, stop using it and follow the maker's instructions for disposal.