In LL-type fin, unlike L-type, the two fin feet are overlapped so as to completely enclose the base tube and ensure an excellent resistance to corrosion.

This type of finned tube is often used as an alternative to the more expensive extruded fin in corrosive environments.

Operating temperature: 180°C.
Tube Material Wall Thickness Tube Diameter Tube Length
All types Min. 0.9 mm
0.035 in
15.88 / 50.80 mm
0.625 / 2 in
Max. 18500 mm
728 in
Fin Strip Material Fin Strip Thickness Fin Pitch Production Capacity
Aluminum From 0.4 to 0.5 mm
From 0.015 to 0.019 in
From 8 to 11 fins/inch 9000 m per day


G, L, LL or KL finned tubes are used in air coolers, heat exchangers and manufacturing plants in general.


We offer different packaging solutions in order to meet your needs:
  • ISPM 15 wooden crates
  • wooden cages
  • industrial wire basket


registered office valtecno
Registered office
Via Piana, 50
47032 Bertinoro (FC) - Italy
VAT number and fiscal code: 02264570405
operational headquarters valtecno
Operational headquarters
Via Piana, 50
47032 Bertinoro (FC) - Italy
Tel. + 39 0543 449206
team valtecno
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