Ul-ef 500xl series air purification system offer state-of-the-art air purifying technology to filter the smog & dust and odors which generated during laser machinery working on materials, like cutting, marking, soldering, engraving, etc. 1. Suction fan speed control by pwm technology, air flow can be continued real time control vs volumes of polluted production smog. 2. Detection and alarm indicator unit for filter blocking and replacement alarming. 3. The system design with tri-filter technology, which included pre-filter, main filter, air filter parts. Main hepa filters remove at most 99.97% of 0.3-micrometer particles, and are usually more effective for particles which are larger. In dusty environments, a hepa filter may follow an easily Cleaned conventional filter (pre-filter) which removes coarser impurities so that the hepa filter needs cleaning or replacing less frequently. Hepa filters do not generate ozone or harmful byproducts in course of its operation. Technical data Max. Purify air flow rate: 480m3/h( air flow can be adjusted) , max. Air speed 40m/s Voltage: ac110/220v, 50~60hz Input power: 320w Noise: =99% Inlet diameter:2x75mm Outline dimension:450x490x850(include suction tube)