Rotary air preheaters

Since 1959, RAFAKO S.A. has manufactured more than 900 preheaters ranging from size 17 to size 34.5, including 16 preheaters with horizontal axis and one flue gas preheater for flue gas desulphurisation plant. The original design of preheaters with rotor balanced on the upper bearing was replaced with new one featuring the lower support bearing. The first preheaters were characterised by a simple design – sealing system consisting of radial and circumferential sealing co-operating with the casing. Currently applied, modern active “follow-up” sealing systems ensure the achievement of minimum leakage of false air to the flue gas