eltherm GmbH (Headquarters)
Phone: +49 2736 4413-8281
As a global provider of electrical heat tracing solutions, eltherm offers a wide range of heating tapes, heating cables and trace heaters for various industrial applications. In most cases these are actually for freeze prevention or temperature maintenance. Due to the different designs of the outer jackets, we can cover temperatures of up to 900 °C* with our heaters.
Which insulation covers which temperature range?
*For high-temperature applications, let our application engineers advise you without obligation.
Series Resistance Heating Cables, fluoropolymer-insulated
Constant wattage heating cables with resistance wire
The heat is generated by allowing an electric current to flow through a specifically adapted conductive material with high electrical resistance, which is then heated up. According to Ohm's law, the heat performance depends on the resistance level (as a function of the specific resistance of the material, its cross section and length) as well as the electrical current flow and thus on the voltage applied. The electrical current flow must not be so high that the melting temperature of the conductor material or the limit temperature of the insulating carrier is reached. For power output regulation purposes, several resistances can be connected in parallel or in series.
Parallel constant wattage heating cables with resistance wire (for example ELP/Si) consist of 2 supply conductors embedded in a first insulation. Wrapped around with the heating conductor, which is surrounded by a second insulation. The corresponding protective braid and the outer jacket provides maximum safety. For example: Typical applications are food industry for heating various pipes, vessels or valves as freeze prevention or temperature maintenance. The required nominal power output is calculated on the basis of various specifications, such as supply voltage, minimum and maximum ambient temperature and maintain temperature. Feel free to contact us!
Serial resistance heating cables can be cut to length (e.g. ELKM-AG-L). The design of this heat cable type is based on a stranded or spirally wrapped heat conductor which is covered by the insulation. On top of this this insulation is a protective braid (e.g. ELKM-AE). To ensure a higher mechanical protection, there are variants with an additional outer jacket available (e.g. ELKM AG-L).
Heating tapes are mainly used for applications that require high flexibility and power output. The design is similar to the series resistance cable, with the difference that they are placed double inside an additional insulation and can therefore also provide more power output. Due to their design, heating tapes are more resistant and optimally protected while at the same time being particularly flexible. They are often used for electrical trace heating on tanks and vessels.
In general, each heating cable and heating tape is operated with appropriate measuring and control technology. As an alternative without temperature control, we can also offer various self-regulating heating cables. We will be happy to advise you in order to find the best solution for your application!
We develop complete solutions for processes in production, storage, handling, and transport. Our engineers are committed to understanding your exact technical requirements. Their pride is to develop the best possible heat tracing solution.
eltherm designer provides the tools to calculate, select and plan EHT systems and solutions for vessels and tanks. Selecting the appropriate eltherm trace heater, picking the associated accessories, and calculating key elements of EHT design have never been easier. This software is provided free-of-charge.
This software is provided free-of-charge.
Shortening of fixed resistance heating cables is not allowed. In the case of self-regulating heating cables, however, the situation is different. Because of their characteristics, shortening is not a problem with these cables.
A heating tape (pipe heat tracing) is a flat, insulated electrical resistance that heats up under electric voltage. Inside, the heating tape consists of an electrically conductive material surrounded by insulating materials.
Self-regulating heating cables are composed of two parallel supply conductors embedded in a cross-linked resistance heating element doped with carbon particles. As the temperature rises, the distances between these carbon particles increase due to molecular expansion. As the resistance increases, the performance decreases and vice versa. Due to this process, heat is regulated and overheating of the heat tracing is prevented. Parallel heating cables with resistance wire consist of two supply conductors which are embedded in a first insulation. The heating conductor (heating resistor) is wrap around it, which in turn is surrounded by a second insulation. The corresponding protective braid and outer sheath provide maximum safety. Serial heating cables consist of a heating conductor resistor, which is surrounded by an insulation. Other configurations are also available, depending on the application. For all heating cable types the following principle applies: by applying voltage, heat is generated via the respective resistor (Ohm's law).
There are many different IP protection classes, which are composed of two identification numbers. These IP protection classes are precisely regulated according to ISO 20653 and DIN EN 60529, among others.