KL-type fin is manufactured exactly like L-type fin, the only difference being that the base tube is knurled before the application of the fin foot.

After the application, the fin foot is knurled into the corresponding knurling of the base tube, thus preventing any movement of the strip. This results in improved heat transfer capability.

Operating temperature: 260°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 baskets


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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