FILTRATION
Air exhausted from the top of the cabinet is filtered by a two-stage filtration system. A prefilter protects the final filter system from particulates > 5μm. The final activated carbon filter incorporates carbon granules with a selected chemical impregnation to optimise the arrestance of specific vapours. Specific impregnations are available for the handling of a wide range of contaminants, including formaldehyde and glutaraldehyde, Alkaline odours, Ammonia and amines, Inorganic acids and acidic odours, H2S and mercaptans and HCN. Special adsorption filters are fitted for the capture of a wide range of vapours. Chemical impregnation of the carbon produces a chemical reaction similar to an oxidation process when the contaminant is adsorbed. This process extends filter life as the surface of the catalyst will not be covered by molecules trapped on it, thus enabling the process to be repeated. These filters will operate effectively in environments with temperature up to 70oC, and with relative humidity up to 80%.
DESCRIPTION RFC Series cabinets have been developed to protect laboratory staff and the environment from toxic vapours, gases, fumes and particles. The cabinets are designed and manufactured to fully comply with Australian Standard AS2243.9: Recirculating Fume Cabinets. The RFC cabinets are suitable for benchtop use and supplied with a stainless-steel work tray. When supplied without the work tray, the cabinet may be installed over a sink or an item of equipment. RFC cabinets can be supplied with a special trolley or stand which allows a separate trolley to be wheeled into the containment enclosure. The mobility of trolley-mounted RFC cabinets is a significant advantage in hospitals or large research institutions, where materials such as glutaraldehyde are handled at multiple locations. These applications include endoscope sterilisation. The RFC cabinet has an inward air velocity that is maintained at > 0.5 m/s ±20% for both benchtop and trolley-mounted installations. In most applications, filtered exhaust air may be discharged to the room. This avoids the air supply system problems that arise with ducted cabinets. In special cases, where the nature or concentration of the contaminant indicates, the cabinet exhaust may be connected to an exhaust fan/ duct system that discharges to atmosphere. RFC cabinets are produced in two (2) sizes, with 900 or 1200 mm nominal work zone width.
RFC-P SERIES
AES Environmental continues to push the design boundaries of its Recirculating Fume Cabinet range; the RFC-P series has been developed for the safe containment of volatile compounds. The special P series features an explosion proof fan and can be configured with a dual bed of carbon or activated alumina to provide a wider range of contaminant removal. The P series is available in 1200mm and 1700mm widths to accommodate for the larger filtration surface area and specially selected fan and operating controls.
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