The high turbulence flow is created by the patented design of the tube coils. The variation of the fluid velocity between the tubes creates a pulse-surge collision flow regime increasing subsequently the heat exchange coefficient outside the tubes.

The possibility of fouling is greatly limited by the non-baffle design, the turbulence of the fluid and the very low surface roughness of the tubes.

The helix-pattern flow in the tubes creates, thanks to the centrifugal forces, a secondary flow consisting of a pair of vortices enhancing the heat transfer coefficient at the peripheral of the tubes.

Spiral tubes are coiled layer by layer in opposite direction to have a homogeneous heat transfer all along the exchanger.