(Embedded Fin)The fin strip is wound into a machined groove and securely locked
into place by back filling with base tube material. This ensures that maximum
heat transfer is maintained at high tube metal temperatures. Maximum operating
temperature for this fin type is 450°C.
Fin material:
Aluminium or copper
Tube materials:
Carbon steel, Cr.-Mo. steel, stainless steel, copper,
copper alloys, etc.
'L'
Fin
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 maximising
the heat transfer properties. The foot of the fin considerably enhances the corrosion
protection of the base tube. Maximum operating temperature for this fin type is
150°C.
Fin material:
Aluminium or copper.
Tube materials:
No theoretical limits.
'KL' Fin
Manufactured exactly as the 'L' fin except that the base tube is knurled before
application of the fin foot. After application the fin foot is knurled into the
corresponding knurling on the base tube thereby enhancing the bond between the
fin and tube resulting in improved heat transfer characteristics. Maximum operating
temperature for this fin type is 260°C.
Fin material:
Aluminium or copper.
Tube materials:
No theoretical limits.
'LL' Fin
Manufactured in the same way as the 'L' fin type except
that the fin foot is overlapped to completely enclose the base tube thereby giving
excellent corrosion resistance. This type of tube is often used as an alternative
to the more expensive extruded type fin in corrosive environments. Maximum operating
temperature for this fin type is 180°C.
Fin material:
Aluminium or copper.
Tube materials:
No theoretical limits.
Semi Crimped
Fin
This fin type is a non taper fin wrapped under tension around the base tube. The
finning process results in a crimp forming at the foot of the fin. Fin is then
welded to the base tube at the strip ends. Maximum operating temperature for this
fin type is 250°C.
Fin material:
Carbon/stainless steel or copper.
Tube materials:
Carbon/stainless steel or copper and copper alloys.
Extruded
High Fin
This fin type is formed
from a bi-metallic tube consisting of an aluminium outer tube and an inner tube
of almost any material. The fin is formed by rolling material from the outside
of the exterior tube to give an integral fin with excellent heat transfer properties
and longevity. Extruded fin offers excellent corrosion protection of the base
tube. Maximum operating temperature for this fin type is 280°C.
Fin material:
Aluminium.
Tube materials:
No theoretical limits.
Production Capability
Profins utilise 2 different types
of finning equipment whose capabilities are as follows.
McElroy finning equipment
Base tube O/D:
From 5/8" (15.88mm) to 2" (50.8mm)
Fin height :
From 1/4" (6.35mm) to 1" (25.4mm)
Fin pitch :
From 5 fins per inch to 12 fins per inch(196
fins/metre to 473 fins/metre)
Fin Thickness:
From 0.012" (0.30mm) to 0.031"(0.76mm)
Base tube material:
Dependent on fin type
Fin material:
Aluminium or copper
Fin types :
L, LL, KL, G
Razmussen finning equipment
Base tube O/D:
From 5/8" (15.88mm) to 4" (101
.6mm)
Fin height :
From 1/4" (6.35mm) to 1" (25.4mm)
Fin pitch :
From 2 fins per inch to 9 fins per inch
(78 fins/metre to 351 fins/metre)
Fin Thickness:
From 0.012" (0.30mm) to 0.040"
(1mm)
Base tube material:
Carbon / stainless steel or copper and copper
based alloys
