Keller's protection concept, ProVent, allows a flameless explosion pressure relief for organic dusts. This unit reduces safety zones and allows for safe ventilation in the event of an explosion. The pressure relief valve avoids an excessive pressure increase in the filter housing.
The shock pressure resistant protection shaft absorbs the shock wave and hot gases are vented safely upwards. Heat energy and possibe remaning particles are retained and absorbed by two additional stainless steel mesh filters allowing for safe explosion pressure relief.