F TUBE for absorption type refregerating


Outline
F tube is a high performance heat transfer tube with many spiral grooves on its outside to promote the spread of liquid solution in the tube axis direction on the tube surface. Its wetting property has been remarkably improved in comparison with that of smooth tubes. This is a new heat transfer tube specifically developed by Furukawa Electric to be used for absorption equipment of absorption type refrigerating units.
pipt F TUBE Refregerating unit with F TUBE

Features
  • Improved wetting property
    F TUBE has an excellent holding property for absorbing liquid on its surface.
  • Wide variety of tube geometry
    Tube's both ends and the middle land portion may optionally be left plain. Because the outside diameter of its grooved section is a little less than that of plain section, F TUBE can be assembled into the shell-and-tube type heat exchangers in the same way as for smooth tubes.


Specifications
Type: Single groove type.
Double groove type

F TUBE drawing section F TUBE drawing
Catalog no Plain section
dimension
Groove section dimension Groove section detail Approx.
weight
Cu
(kg/m)
Outside
diameter
d (mm)
Wall
thickness
Xp (mm)
Outside
diameter
do (mm)
Bottom
wall
thickness
Xf (mm)
Inside
diameter
di (mm)
No. of
grooves
N
Groove
depth
Fh (mm)
Apex
angle
A (degree)
Helix
angle
of
right
hand

(degree)
Helix
angle
of
left
hand

(degree)
75-406043 19.05
± 0.08
1.09
± 0.09
18.90
±0.15
0.9
± 0.1
15.9 40 0.6
± 0.15
100 27  - 0.61
75-616039 19.05
± 0.08
1.0
± 0.09
18.90
±0.15
0.8
± 0.1
16.6 61 0.35
± 0.15
100 27  - 0.52
76-406043 19.05
± 0.08
1.09
± 0.09
18.90
±0.15
0.9
± 0.1
15.9 40 0.6
± 0.15
100 27 27 or 0 0.61
76-616039 19.05
± 0.08
1.0
± 0.09
18.90
±0.15
0.8
± 0.1
16.6 61 0.35
± 0.15
100 27 27 or 0 0.52
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