Why an ignition source should be stopped before it reaches a filter or silo
In processes where combustible material is conveyed pneumatically or mechanically, a spark, glowing particle or other ignition source can travel well beyond the point where it was generated. Critical areas may include conveying ducts, dust-extraction systems, filters, silos and other parts of the plant where combustible material accumulates. Protection therefore has to consider early control of ignition sources inside the process, not only firefighting in the surrounding space.
A spark detection and extinguishing system is intended to identify a hazardous particle in the material flow and trigger a defined response before it reaches a vulnerable part of the process. The final response depends on the risk assessment, project design, client requirements and the rules applicable to the specific installation.
What VdS 2106 covers
VdS 2106 provides guidance for planning and installing spark detection, spark separation and spark extinguishing systems. It covers subjects including detector positioning, control and indication equipment, the extinguishing process, distance between detection and extinguishing nozzles, water supply, pipework, frost protection, and operating and maintenance instructions.
This does not make every industrial application identical. The guideline provides a technical framework; the actual protection concept still has to reflect conveying speed, duct geometry, material properties, available reaction time and the other protective measures used in the plant.
Cause-and-effect logic after detection
A well-defined system makes clear what happens after each signal. Depending on the project, the response may include extinguishing in a conveying duct, an alarm, stopping part of the process, activating a separation device or another agreed action. This sequence is often documented as a cause-and-effect or shutdown matrix.
The matrix should not be a generic template. It has to match the real equipment, process logic and responsibilities at the site. In particular, the fire-protection system, machine controls and the conditions for restarting after an event need to be coordinated.
Information needed before a technical quotation
Useful starting information includes a process description, material type, conveying routes, filters and silos, available duct diameters and lengths, airflow or conveying speed data, and existing electrical and control documentation. Environmental conditions, frost risk, available water, and project, insurer or internal fire-safety requirements may also matter.
Missing information does not prevent an initial technical discussion. The important point is to separate confirmed inputs from items that still need to be measured or defined before a final quotation.
TREE and T&B electronic
TREE d.o.o. is T&B electronic’s authorised sales partner for the Croatian market, with sales rights for Slovenia. T&B electronic develops spark detection and extinguishing systems and references VdS 2106 and VdS 2518 among the rules and guidelines relevant to its solutions.
TREE’s exact scope is agreed for each project, from the initial technical review and quotation to agreed supply, installation, commissioning or other activities. A reliable decision requires review of the actual process and project documentation; this article is a technical introduction, not a substitute for design or risk assessment.
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