Steam Jet Heaters, in-line, are used for both once-through and circulating heating duties. They can either be employed on a once-through basis (type L), to raise the temperature of a liquid by up to 95oC in a single pass, or on circulation systems (type H or system Ciba-Geigy), to raise the temperature of a circulating stream by up to 30oC per pass. With a standard-type heater design (type L or type H), turn-downs of 5:1 are the norm., but if a more sophisticated system is required, with much closer temperature control, with the GEA Steam Jet Heater "System Ciba-Geigy", the turn-down can be as much as 200:1.

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