The same coalescence principle of working so far applied by IMAS AEROMECCANICA to big installations is now proposed also for little depurators series
MCH Functional working - The sucked air enters the depurator through the expansion chamber; the drop in speed causes a fall in kinetic energy , this making the biggest particles fall down into the collecting tank equipped with anti-turbulence interspace. The second stage consists of a metallic pre-filter having optimized section agglomerating the polluting substance and retaining any eventual silicate (solid particles). This pre-filter is easily removable and washable, and its state is indicated by an outer manometer. The third stage of filtration, the heart of the depurator, consists of a self-draining coalescence candle made of a series of pierced metallic cylinders, inside which are placed the compressed glass fibres, disposed by alternating variable sizes between 6 and et 12 microns The filtration, based on the Brownian diffusion principle of sub-micron particles, guarantees an efficiency degree of more than 96-98%, and this with no need of any maintenance or replacement operation. During draining oil is collected in a suitable integrated tank, from which it will be evacuated automatically by means of the Clapet valve. The depurated air goes through the fan – which is then crossed by clean air – and is conveyed towards the final filter (HEPA H14 EN 1822 efficiency 99,99%), which also serves as a diffuser. The high efficiency degree reached by the candle guarantees a long life to the HEPA filter, the state of which is controlled by a differential pressure gauge with alarm warning light.