Double “L” fin is used on applications requiring additional corrosion protection to the surface of the base tube. The production process is similar to the L Fin Tube type . However , the improvement is that the ‘L’ Foot of the previous fin is completely overlapped by the ‘L’Foot of the next fin. This gives the Fin base a shape of tow ‘L’ foot simultaneously.
Operating temperature is a little higher than for L fin.
A wide range of both tube and fin materials are available.
Heat transfer performance can be enhanced by utilising unique internal solder bonded or pulled in secondary surface/turbulator system.
---LL Type
