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Circulation and exhaust air ventilation in extraction systems for critical dust emissions

“What needs to be kept in mind when extracted air is to be recirculated in workspaces?”

“What needs to be kept in mind when extracted air is to be recirculated in workspaces?”

In light of the characteristics of air-borne contaminant particles, this question is of particular importance. That is because, during welding work and similar processes in particular (for example laser material processing), carcinogenic, mutagenic and reprotoxic emissions can be produced.

As a detailed set of guidelines, the Technical Rules for Hazardous Substances (TRHS) offer comprehensive and authoritative information about when and under which circumstances v entilation systems with air return can be used.

Generally, the operator is responsible for the risk assessment for the selection and use of extraction systems based on his machining processes. The operator must carry out organizational measures and technical precautions to protect the health of his employees.

TBH offers extraction and filter systems that are already state-of-the-art in the design phase. For example, H14 particle filters are integrated into our extraction systems as an additional filter level or policing filter module, and we also offer complete exhaust equipment systems for releasing the cleaned air outdoors.

This means that our customers don’t just get a safe product, they get an individualized extraction and filter system that guarantees the necessary and required level of safety in their pre-defined machining process.