Our Airlocks maintain a consistent seal at the outlet of the dust collector while allowing material to continuously pass through. This seal also allows discarded material to be properly discharged, and prevents it from returning to the dust collector.

OSHA doesn’t mandate a specific type of extractor, but it does set Permissible Exposure Limits (PELs) for substances found in welding fumes, including manganese, hexavalent chromium, and nickel. If your operation exceeds those limits, engineering controls are required before relying on PPE. Standards 29 CFR 1910 Subpart Q and 29 CFR 1926 Subpart J apply to most welding operations.

Source capture or capturing as close to the source as possible is almost always preferred because it removes fumes at the point of generation, before they reach the welder’s breathing zone. Ambient extraction is a secondary option when source capture isn’t practical, such as in facilities with overhead cranes or frequently changing layouts. Many shops combine both.

A fume arm or hood should typically be within 10 to 15 inches of the arc. The closer the extractor is to the source, the less airflow (CFM) is needed to do the job. Fume extraction guns with built-in capture sit just 2 to 3 inches away and can capture up to 99% of fumes but are very cumbersome for the technician to use and often are removed by the operator.  Fume snorkel arms can also be difficult because if there is a long weld the operator may have to move the arm several times during a weld.

It depends on the capture method. A fume extraction gun typically needs 35 to 100 CFM. A fume arm positioned 10 to 15 inches from the weld generally needs 600 to 900 CFM. Overhead hoods and ambient systems often require several thousand CFM. A professional assessment will give you an accurate number for your specific operation.

Yes. TIG produces less visible smoke than MIG or stick welding, but it still generates ultra fine metal particles, ozone, and nitrogen oxides. Because TIG fumes are finer, they can penetrate deeper into the lungs. TIG on stainless steel is especially concerning because of hexavalent chromium exposure.

Essentially all welding processes generate smoke that require extraction, including MIG (GMAW), Flux Cored (FCAW), TIG (GTAW), Submerged Arc (SAW), Electroslag (ESW), oxyacetylene, and resistance welding. FCAW and stick welding produce the heaviest fumes, while TIG produces the least visible but still hazardous emissions.

The terms often overlap, but there’s a distinction. A dust collector handles large volumes of heavier particulate like grinding dust or wood chips. A fume extractor is optimized for the submicron particles produced by welding, which require higher efficiency filter media. Cartridge collectors like the CMAXX or Shadow can function as both.

Filter life depends on welding volume, filter media, the materials welded, and whether the system has self-cleaning (pulse jet) technology. Quality cartridge filters, like DeltaMAXX Prime with 400 sq ft of media, can last years in light-duty use and 6 to 18 months in heavy production. Rising differential pressure across the filter is the best indicator that a change is due.  Some dust collection manufacturers will undersize their machines, so an end user needs to replace filters more frequently.

Both options work. Recirculating units return filtered air to the facility and save energy on heating and cooling, but recirculation isn’t allowed when welding materials that produce hexavalent chromium, beryllium, or other highly toxic metals unless an additional layer of HEPA filters are integrated. Exhausting outdoors is safer for hazardous materials but may require a makeup air system.

Welding fume isn’t typically flammable while suspended in air, but the fine metallic particles and oxides it contains can exhibit combustible properties under certain conditions.  Some even consider other dust particles in the environment that could get into the dust collector.  We always suggest a customer get their dust tested by a lab to ensure it is not explosive. NFPA standards recommend passive protection like a Spark Trap to limit sparks from getting to a dust collector and starting a fire.

A fume arm (or snorkel arm) is a flexible, articulated extraction arm with a capture hood at the end. The welder positions the hood near the weld to pull fumes into a dust collector. Fume arms are best for fixed or semi mobile welding stations and rely on the welder actively repositioning them for best results.

An ambient system cleans the air in an entire workspace rather than capturing smoke at the source. It pulls fumes through the facility’s overhead space using high-volume fans and filtration, then returns the cleaned air to the floor. Imperial Systems’ CMAXX or Shadow Ambient dust collectors can cover a wide range of building sizes.

Yes. Portable units are cost-effective for small shops, mobile operations, and job sites.

Start by documenting your welding processes (MIG, TIG, FCAW), the materials you weld (mild steel, stainless, aluminum), your production volume, and your facility layout, including ceiling height and obstructions. From there, a fume extraction specialist can recommend source capture, ambient, or a hybrid system sized correctly for your CFM needs.