Engineered for maximum processing performance, Freund-Vectorâ€™s VFC Flo-Coater® systems provide the fastest possible spray rates and the most efficient drying results. Exhaust filters are located well above the effective processing area, keeping the filters cleaner and improving processing yields. Product flows more uniformly within the tapered expansion chamber (as opposed to a straight-sided expansion chamber), providing benefits for both top spray granulation and fluid bed drying processes.
An atomizing spray gun with a tri-axial wand is the standard spray gun used with Freund-Vectorâ€™s VFC Flo-Coater® systems. Solution, atomization air, and spray air are supplied through the wand, creating a non-cluttered, easy-to-use spray gun. The number of nozzles is determined by the spray area associated with each VFC Flo-Coater® system. The three-nozzle system, shown below, is used for top-spray granulation processes ranging from 220L to 1100L.
The Conidur Plate, standard on all Freund-Vector VFC Flo-Coaters®, provides a more consistent distribution of airflow across the product plate, significantly reducing â€˜rat-holingâ€™ problems. For granulation processes, the Conidur Plate provides improved product movement through the spray zone. For drying processes, it improves consistency with the finished product. Another advantage of the Conidur Plate is its ability to provide directional airflow, which assists in the vacuum discharge of product.
Containing product to 2 microns, Freund-Vectorâ€™s polyester Cartridge Filters provide the most efficient filtration method available for fluid bed processing. Filters are alternately cleaned by pulses of air blown back through the filters. The cartridges are lighter in weight and easier to handle than bag filters, reducing the time required to clean and change-over filters. Filters are easily removed for cleaning and maintenance with the automated filter lowering option. Stainless steel cartridge filters are also available for CIP applications.
Rated normally at 20 micron retention, Freund-Vector Corporation provides bag filters in both single and double bag construction. With single bag construction, process air is interrupted as the bag shakes particulate back into the product container. With double bag construction, process airflow flows through one bag while the other bag shakes. Using this method, airflow is not interrupted and process times can be reduced. Bag filters are not recommended for CIP or potent compound applications.
The Flo-Coater® system can be executed in three-piece construction. With this design, additional processing inserts of different sizes and functions can be incorporated into the system. The 12 Bar Flo-Coater® system, at left, is shown with a tapered Wurster insert. By changing the expansion chamber and processing insert, the Flo-Coater® system can be easily configured for top spray granulation or rotor processing.