In a spring factory, fire broke out at 3:30 pm on filtering parts of a dust removal device installed on a production line (namely, the valve springs line). The device’s automatic inerting system (which consisted of 2 powder extinguishers) was activated. The production workshop’s energy supply was cut off, the building’s smoke exhaust hatches opened and employees evacuated. First responders and plant employees extinguished the fire and then suctioned and stored the extinction water in barrels. Traffic on the street adjacent to the facility was detoured during the emergency intervention. This production line was shut down for 8 days in order to perform the necessary repairs. According to the operator, the fire was caused by foreign combustibles stuck in the upper part of filters that ignited in contact with incandescent metal particles. The operator alerted personnel to these risks and installed on each suction station an operating guideline prohibiting the introduction of foreign elements. Moreover, the operator outlined the design and implementation, in conjunction with fire-fighters, of a detailed intervention plan in case of accident.