Setting the standard in spiral heat exchangers

Alfa Laval’s ALSHE LTL range of spiral heat exchangers is ideal for duties such as heating, cooling and heat recovery in liquid/liquid applications - where exchangers with narrower flow channels would be at risk of fouling - thanks to its single channel design.

The ALSHE LTL range consists of seven standard models, all available off the shelf in standard materials.  Designed for maximum thermal efficiency, the spiral heat exchanger is compised of two concentric spiral flow channels. The hot medium, generally, flows from the centre to the periphery of the unit while the cold medium flows in the opposite direction. This counter-current flow ensures maximum heat transfer between the two media, providing very close temperature approach and temperature crosses.

The use of single channels also reduces the risk of fouling and clogging and bypassing. Whereas in multi-channel exchangers, if clogging occurs the fluid is redirected through other, clear channels, in the spiral unit the flow velocity increases, creating a scrubbing action which washes the obstruction away.  This arrangement also increases the efficiency of chemical cleaning since cleaning solution is fully contained within the heat transfer channels.