Sanding dust extraction systems

Sanding Dust – A Health, Fire and Production Hazard

• Health. Hardwood dust (oak, beech, ash) is classified as a Group 1 carcinogen by the IARC. The occupational exposure limit in Poland is 2 mg/m³. A sanding department without extraction typically exceeds this value many times over. A dust extraction system not only protects employees but also serves as evidence of compliance during labour inspections.
• Brand und Explosion. Die minimale Zündenergie von Holzstaub kann in bestimmten Fällen nur wenige Millijoule betragen und damit niedriger sein als die Energie einer elektrostatischen Entladung. Eine Filteranlage ohne ATEX-Zertifizierung und Explosionsdruckentlastung stellt ein reales Risiko dar. Die Tische RODONIT und CASTOR sind mit ATEX-Motoren erhältlich und entsprechen der Richtlinie 2014/34/EU.
• Production. Dust settling on components before coating generates defects and customer complaints. Facilities equipped with effective extraction systems report maintenance cost reductions of 15–25%.

Technical Solutions for Wood Dust Filtration

• Filtration adapted to production scale. For small workshops, the CASTOR table (2,500 m³/h, two-stage filtration with air recirculation) or a MALACHIT extraction wall may be sufficient. Larger facilities use KALCYT workstations equipped with pocket filters and extraction fans, OPAL tables (1,200–2,500 m³/h per workstation), or RODONIT tables (5,500–6,600 m³/h), the latter available with automatic compressed-air filter cleaning.
• Regeneration without downtime. NAWARA systems are equipped with automatic pulse-jet cleaning controlled by a differential pressure switch. Filter bag life under proper operating conditions can reach 8–12 years.
• Heat recovery. KALCYT workstations and floor-level sanding extraction systems enable the recirculation of cleaned air back into the production hall. Rotary or plate heat exchangers recover 60–85% of thermal energy. In larger facilities, annual heating cost savings can reach PLN 30,000–80,000.

NAWARA – Solutions Tailored to Each Facility

A sanding department in a small woodworking workshop and one in a factory producing 500 doors per day present two completely different engineering challenges. NAWARA does not sell standard catalogue products. Every installation is preceded by process analysis, airflow calculations, and duct network design. The customer receives a system designed specifically for their machinery, facility, and compliance requirements, whether it is a single CASTOR table (700 × 1,300 × 930 mm, 150 kg) for a small workshop or a multi-workstation OPAL configuration with work surfaces up to 3,000 × 1,000 mm and airflow requirements of 2,500 m³/h per workstation. The possibility of phased expansion – adding workstations, increasing fan capacity, or integrating new machinery – is planned already during the preliminary design stage. NAWARA floor sanding extraction systems are built from modular 1 × 1 m sections, allowing flexible adaptation to the layout of the facility and production profile, with the option of adding additional sections as required.