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Project planning information > Radiant tubes
6 .7 .2 Metallic radiant tube
Install the radiant tube free of mechanical stress.
Ensure that there is an annular gap of ≥ 20 mm between the
radiant tube and the furnace lining.
Insulate the metallic radiant tube with a 20 mm Cerablanket
mat or similar material.
Plan the height of the furnace extension so that the front edge
of the recuperator is flush with the interior furnace wall (S1 =
0 ± 20 mm).
The burner Ecomax M can be installed in different me-
tallic radiant tubes: single-ended radiant tubes SER-M,
P radiant tubes or twin P radiant tubes.
The metallic radiant tubes are available in a variety of dimen-
sions in either centrifugal casting or in welded form. The ef-
ficiency of the burner Ecomax M is determined by the internal
diameter d
of the radiant tubes in the vicinity of the burner.
i
The following dimensions are recommended:
Radiant tube internal diameter d
Burner
recommended
ECOMAX 1M
ECOMAX 2M
ECOMAX 3M
ECOMAX 4M
ECOMAX 5M
ECOMAX · Edition 02.11
[mm]
min.
128
≤ 127
148
≤ 147
187
≤ 184
250
≤ 246
280
≤ 280
6 .7 .3 Radiant tube distances
For furnace temperatures > 600°C:
The centre to centre distance of the radiant tubes should be
≥ 2.5 d. The distance of the radiant tubes from the furnace
wall, from the furnace floor or from the material to be heated
should be ≥ 1.2 d.
For furnace temperatures < 600°C with air circulation of 15 m/s:
i
The distance of the radiant tubes from one another and from
the furnace wall should be ≥ 100 mm.
∅X
1.2X
2.5X
≥100
≥100
mm
mm
≥100 mm
32
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