TECHNICAL CONSTRUCTION
The resistance wire is wound around a very thin fibreglass core. It is then laid out on a sheet of fibreglass-rein-forced silicone cloth and usually arranged in a symmetrical pattern. If desired, the spaces between the wire runs can be made smaller in some sections of the element in order to achieve a higher output in those areas. Next, a silicone cloth is put on top and the complete element is placed in a vacuum chamber, where all air is removed from it. Lastly, the element is vulcanized under pressure and a high temperature.
Technical data
| Dimensions: | From 10x10mm (min) to 915x280mm |
| Thickness: | 1.5mm (std) – 0.5mm (min) |
| Weight: | 1.5mm weighs 2.2 kg/m², 0.5mm weighs 0.65 kg/m² |
| Operating temperature.: | Continuous operation – max 250°C |
| Surface power: | Depending on the operating temperature – see diagram 1. |
| Sheath temperature.: | Depending on the surface power – see diagram 2 |
| Voltage: | Max. 480V |
| Current: | Max. 30 Ampere |
Maximum surface power “Rule of thumb”
| 0.75 W/cm² | In open air |
| 1.5 W/cm² | Glued against metallic surface |
| 2.3 W/cm² | Clamped to metallic surface |
| Max. resistance/cm² | 31 W/cm² |
Special designs:
- Built-in thermostats
- Built-in thermocouples
- Waterproof element
- Different voltages
- Customer specified connection cables
- Extra thin constructions (0,5mm)
- Unsymmetrical heat concentration.
- Barrel heaters.
