Able to be flexibly adapted to various process conditions, ULT 1500 and ULT 2500 remove and filter hazardous substances in dust, laser fume, and welding smoke. Geometry of conic filter cartridges increases filter performance and cleanability, and dust deposits are collected directly in 70 l removal container for low-contamination disposal. Rotary nozzle dedusting reduces compressed air consumption, and filtered air can be fed back to working area to avoid heat loss.