Plasma cutting creates a hot, forceful plume that can overwhelm weak extraction. The most reliable way to protect operators and nearby work is to capture at the torch, then support it with table design and room airflow.

Design for source capture

Start with the table: water trays reduce plume energy and trap particulates; downdraft slots beneath the cut pull fume away from the operator. Keep unused zones blanked. Pair this with a torch-side hood or ring that follows the cut and draws plume immediately, before it expands.

Positioning and adjustment

Keep the capture inlet as close to the arc as process stability allows. Reposition when torch angle, height, or travel speed changes. Use smooth duct runs and balance dampers so flow is delivered where the cut is happening, not to open, unused areas of the table.

Filter and airflow choices

Use high-efficiency filtration (H13/H14) to prevent ultrafine re-release. Focus on airflow under load rather than catalogue free-air figures; pressure drop from filters and ductwork matters. Inspect prefilters frequently so the system does not starve the torch hood of flow.

Training and maintenance

Operators should treat the hood position like a tool setting—check it each setup. Plan for routine inspection of seals, bellows, flexible hoses, and gaskets; small leaks undo capture at the torch. Clean only with industrial vacuums; avoid sweeping or compressed air.

Practical takeaways

• Use water tables or downdraft to calm the plume and support torch capture.
• Keep the hood close and adjust whenever parameters change.
• Select H14 filtration and check performance under load.
• Maintain seals and prefilters to preserve capture velocity.
• Vacuum for clean-up; never sweep plasma residues.

Where the layout demands mobility, weld fume extractors can provide near-torch capture, provided the hood is kept close and the duct run is short and tight.