RF Drying Equipment
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STALAM RADIO FREQUENCY DRYERS
STALAM radio frequency dryers have some specific design and construction features which allow their users to obtain the maximum benefits from the RF technology in terms of quality of the dried products, reduced operating costs, flexibility and reliability.
The RF generators are entirely designed and manufactured by STALAM; they are of the "lumped components" type, having high efficiency (Q factor) and outstanding reliability; all components and circuits are easily and quickly accessible.
The cooling system of the triodes is made up of a double water circuit; it is designed to allow the longest possible life of the triodes and does not require periodic maintenance operations. Upon request, and as standard in some specific applications, STALAM also supplies generators fitted with a forced-air cooling system.
The RF power adjustment is accomplished by means of a semi-automatic circuit which controls the power supplied to the product being dried through a variable capacitor, located in the generator. No continuous raising or lowering of the upper electrode for RF power adjustment is required in STALAM dryers: the electrode is fixed or automatically positioned at pre-set heights.
The power density is as low as 5 to 14 kW(RF)/sqm of electrode surface. Therefore the heating/evaporation process is extremely gentle and the quality of the dried product is greatly enhanced.
The construction is modular, in the sense that high capacity dryers are made up of two or more drying modules, connected in series; this construction principle allows STALAM dryers to work with reduced RF power densities in all circumstances. Further modules can be added to the first at any time, so that considerable investment and floor space savings are possible.
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