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Introduction |
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Tubular heaters are used for almost every kind of heating appliances. They are easy to form and feature highest
mechanic stability and electric properties at the same time. Even though tubular heaters are technically rather
mature and universal to use, there exist various new innovative solutions for many applications. Thus flexible
heating pipes (see chapter 4.1) developed to be a new industry standard for the use in heating platens, welding
bars and manifolds. Screw in tubular heaters are standardised for use in liquids like water. Ripped tubular heater
are especially for air-heating-cabinets or tunnels.
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4.1 Flexible Heating Pipes |
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Square stainless steel heating pipes BASE-flex (1.4541) are a reliable industry standard for the use in
heating platens and manifolds.
In contrast to traditional tubular heaters with a round section which have
to be bent by machines, square BASE-flex can be fitted into any rectangular groove with simple hand tools
by yourself. Moreover, the square shape results in a bigger heat emitting area of up to 80% compared with
a corresponding round section. Finally, the easy manual mounting saves the usually high technical expenditure
for casting-in / soldering / cementing of bent round tubular heaters.
A soft version of the BASE-flex, the NICKEL-flex (2.4068) is available as special execution.
Due to the soft, easy to form nickel material, the NICKEL-flex is suitable for manual mounting with hand
tools in round sections, too. Furthermore, Nickel has a better capability to conduct heat compared with stainless steel.
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| Available terminals: |
| Blade terminal 6,3 mm |
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Standard (from stock) |
On request: with screw bracket |
| Terminal pin |
Standard (from stock) |
On request: with porcelain holder |
Threaded pin
M2,5 l 6,5 mm
M3 l 8,5 mm
 6 x 6 mm
8 x 8 mm
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Standard |
On request: with nut and washers |
| Leads |
On request |
On request: with protection sleeve |
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| Selection table length/power |
| Cross section |
4,5x4,5 mm ± 0,05
Ø 5,0 mm ± 0,10 |
6x6 mm ± 0,05
Ø 6,5 mm ± 0,10 |
8x8 mm ± 0,05
Ø 8,5 mm ± 0,15 |
| "flex"-Type |
BASE-flex
(NICKEL-flex) |
BASE-flex
(NICKEL-flex) |
BASE-flex
(NICKEL-flex) |
| min. bending radius |
12 mm |
15 mm |
20 mm |
| unheated length |
25 mm ±5 |
30 mm ±5 |
40 mm ±5 |
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Standard |
Standard
6x6 BASE-flex available from stock |
Standard |
| Total length [mm] |
Power [W] 230 V |
| 250 |
200 |
- |
- |
| 300 |
250 |
- |
- |
| 350 |
300 |
550 |
- |
| 400 |
350 |
650 |
- |
| 450 |
400 |
750 |
- |
| 500 |
450 |
800 |
- |
| 550 |
500 |
900 |
- |
| 600 |
550 |
1000 |
- |
| 650 |
600 |
1100 |
- |
| 700 |
650 |
1200 |
- |
| 750 |
700 |
1300 |
- |
| 800 |
750 |
1350 |
- |
| 850 |
800 |
1450 |
- |
| 900 |
850 |
1550 |
2100 |
| 950 |
900 |
1650 |
- |
| 1000 |
950 |
1750 |
2300 |
| 1050 |
- |
1850 |
- |
| 1100 |
- |
1950 |
2500 |
| 1150 |
- |
2050 |
- |
| 1200 |
- |
2100 |
2700 |
| 1250 |
- |
2200 |
- |
| 1300 |
- |
2300 |
2900 |
| 1350 |
- |
2400 |
- |
| 1400 |
- |
2500 |
3100 |
| 1450 |
- |
2600 |
- |
| 1500 |
- |
2700 |
3300 |
| 1550 |
- |
2800 |
- |
| 1600 |
- |
- |
3500 |
| 1700 |
- |
- |
3700 |
| 1800 |
- |
- |
3900 |
| 1900 |
- |
- |
4100 |
| 2000 |
- |
- |
4300 |
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| CONSTRUCTIVE SPECIFICATIONS AND TOLERANCES |
| Wattage |
+ 5% |
- 10% |
| Resistance |
- 5% |
+ 10% |
| Dielectric strength |
1500 |
V |
| Insulation (cold 1000 Vdc) |
> 10 |
MW |
| Leakage current (cold) |
< 0,5 |
mA |
| Maximum working temperature |
750 |
°C |
| Length tolerance |
± 5 |
mm |
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4.2 Tubular Heaters |
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Round Tubular Heaters can be manufactured depending on the diameter in lengths up to 6900 mm. They can be
delivered straight, bentable annealed or to bent according to customer’s drawings. Round Tubular heaters
are specially for air and fluid heating. In application where the required watt density is not high they
can be installed also in plates by pressing. In air- or fluidheating application the heater is often
assembled with a hexagon fitting pressed or welded on the tube near the electrical connection. This is
used for fixing and sealing functions. To calculate the watt density in air/fluid heating application
the important information are air/fluid speed and required outlet temperature.
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| Available dimensions and materials |
l 6,5 mm (1.4404 / 1.4828 )
(min. length: 330 mm / max length: 3000 mm)
l 8,5 mm (1.4404 / 1.4571 / 1.4828 / 1.4876 / 2.4858)
(min. length: 330 mm / max length: 4500 mm)
l 10 mm (1.4304 / 1.4541)
(min. length: 330 mm / max length: 6900 mm)
Fixing:
» Screw-in nipple M14x1,5 in various lengths
Terminations:
» leads (silicone or fibre glass)
» Blade terminal 6.3 mm
» Blade terminal with M4-screw
» screw M4 (only for Ø 8.5 mm)
» pin 2.0 mm / 4.0 mm
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4.3 Screw in Tubular Heater |
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Screw in Tubular Heaters are the standard solution for all heating processes with liquids
or gas. The heater is installed in a tank or a tube system by the G1½" screw fitting. The connection head
IP54, fitting and tubular heater consists of stainless steel. The tube sheath material 2.4858 is resistant
to sulphite, phosphors and hydrochloride media.
All types are available
» without controller and limiter
» with controller (adjustable from 30° to 85°C, freezing protection at 7°C)
» with limiter (adjusted to 110°C)
» with controller-limiter-combination
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| Wattage |
Voltage |
Thread |
IMM*¹ in mm |
H in mm |
L in mm |
D in mm |
H1 in mm |
| 2000W (3x 666W) |
3x 230V |
1½ G |
250 ± 10 |
132 |
382 ± 10 |
93,5 |
119 |
| 3000W (3x 1000W) |
3x 230V |
1½ G |
250 ± 10 |
132 |
382 ± 10 |
93,5 |
119 |
| 4500W (3x 1500W) |
3x 230V |
1½ G |
350 ± 10 |
132 |
482 ± 10 |
93,5 |
119 |
| 6000W (3x 2000W) |
3x 230V |
1½ G |
450 ± 10 |
132 |
582 ± 10 |
93,5 |
119 |
| 7500W (3x 2500W) |
3x 230V |
1½ G |
550 ± 10 |
132 |
682 ± 10 |
93,5 |
119 |
| 9000W (3x 3000W) |
3x 230V |
1½ G |
650 ± 10 |
132 |
782 ± 10 |
93,5 |
119 |
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| *¹IMM = Immersion depth |
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4.4 Finned Heaters |
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Finned Heaters are the ideal solution for air or gas flow heating processes. The ribs enlarge multiply the heat-emitting surface.
Basis of the finned tubular heaters are our 8.5 mm tubular heaters. The outer diameter of the fins is 28 mm. The elements can be delivered straight,
U-shaped or circular. Tubular heater as well as fins are made of stainless steel, the standard for the tube is 1.4828 (other materials possible as in chapter 4.2),
the fins are normally made of 1.4301 (1.4571 on request).
Fixing:» Screw-in nipple M14 x 1.5 mm
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| terminations |
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| 6,3 mm blade terminal |
M4 screw |
leads |
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