Selecting the right filter type for respiratory protection while welding

Welding, grinding, and plasma cutting bring along an invisible danger – fine dust, solid particles, toxic fumes, and gases. Using a powered air-purifying respirator (PAPR) unit is essential, but the unit itself won't protect you unless you have the correct type of filter installed.

Choosing the right filter from the Evermatic range depends on two main factors: the material you are welding and the environment you work in. Let's break them down so you can make an informed choice instantly.

Particle Filters (P3 / PR SL) – The Standard for Every Welder

These filters protect against solid and liquid particles, welding fumes, grinding dust, and aerosols.

✅ When to choose them: Standard welding of stainless steel, aluminum, and general metal grinding.

✅ In the Evermatic range: Standard P3 particle filters that capture up to 99.98% of hazardous microparticles.

✅ Pro Tip: Always use a pre-filter. It is an inexpensive fabric layer that catches the coarsest debris, significantly extending the lifespan of your more expensive P3 filter.

Odour Filters – For Enhanced Comfort

These contain a thin layer of activated carbon. They do not filter out toxic gases, but they effectively eliminate unpleasant smells.

✅ When to choose them: If you weld in environments where bothersome odors are present, but the concentration of hazardous gases does not exceed safe limits. Ideal for automotive and mechanical workshops.

Combined Gas and Chemical Filters (A1B1E1K1 P3) – Maximum Protection

If you work with chemicals, specific alloys, or in confined spaces, a pure particle filter is not enough. You need a combined filter that captures both particles (P3) and gases or vapors.

What do those cryptic letters on Evermatic filters mean?

✅ A (Brown): Organic gases and vapors (e.g., solvents with a boiling point above 65°C).

✅ B (Grey): Inorganic gases and vapors (e.g., chlorine, hydrogen sulfide).

✅ E (Yellow): Acid gases and vapors (e.g., sulfur dioxide).

✅ K (Green): Ammonia and organic amine derivatives.

💡 Real-world example: If you weld galvanized sheets or work in the chemical industry, the A1B1E1K1 P3 filter is your only safe option. It protects you from "zinc fume fever" as well as toxic gases.

📋Quick Selection Guide: What Are You Welding?

When Is It Time to Replace the Filter?

Don't leave the replacement to the last minute. Replace your filter immediately if:

✅ You smell or taste the welded material/gas (for gas or combined filters).
✅ Breathing becomes difficult – the filter is clogged with particles, forcing the PAPR unit to work harder (the unit's alarm will often alert you to this).
✅ The filter is visibly clogged, greasy, or mechanically damaged.

💡 Summary: You shouldn't choose the right filter on evermatic.eu based on price, but rather on the specific material you handle. Investing in the correct combined filter is a direct investment in your long-term lung health.