The strip material is subjected to controlled deformation under tension, giving the optimum contact pressure of the foot of the fin onto the base tube, thus maximizing the heat transfer properties. The foot of the fin considerably enhances the corrosion protection of the base tube.
Manufactured the same way as the 'L' type, except the fin foot is overlapped to completely enclose the base tube, giving excellent corrosion resistance. Often used as an alternative to expensive extruded fins.
The base tube is knurled before the fin foot is applied. After application, the fin foot is knurled into the tube, enhancing the bond and improving heat transfer characteristics.
The fin strip is wound into a machined groove and securely locked into place by backfilling with base tube material. This ensures maximum heat transfer at high tube metal temperatures.
Formed from a bimetallic tube (aluminum outer/any material inner). The fin is rolled from the outside tube to give an integral fin with excellent longevity and outstanding corrosion protection.
