any
aluminium, copper
L = 15 500 mm

120°C
made by wrapping base tube with a fin strip
Dw = 12,7–51 mm, h = 6–16 mm, n = 6–11 fins/inch
according to customer requirements and our internal standard: WTWiO-2010/WRAPPED/1

any
aluminium, copper
L = 15 500 mm

150°C
made by wrapping base tube with a fin strip, as in the case of type L, but in a way that guarantees better corrosion resistance
Dw = 12,7–51 mm, h = 6–16 mm, n = 6–11 fins/inch
according to customer requirements and our internal standard: WTWiO-2010/WRAPPED/1

any
aluminium, copper
L = 15 500 mm

250°C
made by wrapping base tube with a fin strip, but the contact surface is additionally knurled, which ensures better contact. For this reason, this type of fin construction ensures better heat transfer characteristic than in the case of type L and LL
Dw = 12,7–51 mm, h = 6–16 mm, n = 6–11 fins/inch
according to customer requirements and our internal standard: WTWiO-2010/WRAPPED/1

any
aluminium, copper
L = 15 500 mm

450°C
made by wrapping fin strip over a groove in the base tube surface and then securely tightened. This technique allows the tubes to be used at high temperatures
Dw = 12,7–51 mm, h = 6–16 mm, n = 6–11 fins/inch
according to customer requirements and our internal standard: WTWiO-2010/WRAPPED/1
