Self-Regulating Heating Technology

Raychem Self-Regulating Heating Cables (BTV, QTVR, XTV and KTV) can maintain temperatures up to 150°C and are ideal for tank heating when design and installation flexibility are required. 

Raychem self regulating heating cables work when:

Self-Regulating

This property enables the cables to react on local temperature differences to ensure an optimum temperature distribution on the vessel wall and even allows them to be overlapped multiple times without risk of overheating or damages.

The cables

In addition, Pentair Thermal Management also offers a wide range of components to realize a state of the art installation, including all accessories to facilitate installation on vessels.


Power Limiting Technology

Raychem Power-Limiting Heating Cables (VPL) feature high power outputs at high maintain temperatures. These flexible heating cables are rated for

Power-Limiting

Power-limiting heating cables are parallel heaters formed by a coiled PTC resistor alloy heating element wrapped around two parallel bus wires that makes an alternating contact with the bus wires. The positive temperature coefficient effect (PTC) of the heating element reduces power output as ambient temperature increases.

The power  limiting cables:

In addition, Pentair Thermal Management also offers a wide range of components to realize a state of the art installation, including all accessories to facilitate installation on vessels.


Parallel Constant Wattage Technology

Raychem Parallel Constant wattage Heating Cables (FMT & FHT) are a cost effective solution when the requirements of the application are not so critical.

The round flexible heating cables are rated

They are usually installed with a more advanced control & monitoring system and depending on the design, temperature limiters.

In addition, Pentair Thermal Management also offers a wide range of components to realize a state of the art installation, including all accessories to facilitate installation on vessels.


Polymer Insulated Series Technology

HEW-THERM XPI Polymer Insulated (PI) Series heating cables can be used when the circuit lengths exceed the ratings of conventional parallel heating cables and a single power source is needed. This technology allows for circuit lengths up to 5km from a single power supply point which makes the most economical choice when high loads are required.

The usage of PTFE in the inner and the outer insulation layer results in a very high temperature resistance of the heating cables and an excellent chemical resistance against the most aggressive products. The production process of the insulation jackets keeps the cables extremely flexible for ease of installation, stripping and simplified termination.

The heating cables are suited for exposure temperatures up to 260°C (intermittent up to 300°C) without polymer degradation or decrease of insulation resistance. Typical power outputs are in the range of 30W/m.

Besides the heating cables, Pentair Thermal Management also offers a wide range of components to realize a state of the art installation with a reliable and predictable performance.

Since the performance of a series system is dependent on the total circuit length, applied voltage and electrical configuration (star or delta), any change of the system requires a re-validation of the design.

Depending on the design method (stabilized or control limited) and area of usage (hazardous area or not), the trace heating system might require the installation of:

Therefore, series heating systems are typically used with more sophisticated control systems.


Mineral Insulated Series Heating Systems

Pyrotenax® Mineral Insulated (MI) heating cables are series heating cables and are suitable for maintain temperatures up to 600°C and / or exposure temperatures of the heating cables up to 650°C.

Mineral insulated heating cables are the ideal solution when the application‘s temperature and power requirements exceed the capabilities of self-regulating parallel, power-limiting parallel and polymer insulated series heating cables.

Mineral Insulated heating cables consist of one or two conductors embedded in a highly dielectric magnesium oxide insulation surrounded by a metal sheath, optionally served with HDPE or FEP for additional corrosion protection (available for copper sheathed cables only). Because of this construction, MI heating cables provide superior strength in dynamic cut-through and crush tests. Special annealing processes maximise flexibility for ease of on-site handling.

Pentair Thermal Management offers single conductor MI heating cables in a multitude of different sheath materials:

The choice of different sheath materials offers the advantage to be able to select the most appropriate jacket material.   Based on environmental parameters (corrosion) as well as the ability to withstand extreme temperatures these sheaths resist process temperatures.  Also to allow higher power outputs since increased power is directly translated in higher sheath temperatures.

Dual conductor MI heating cables are only available in Alloy 825.The use of dual conductor heating cables offers a significant technical advantage when space is limited or when high resistances are required. (e.g. high temperature instrumentation lines, short branches)  Furthermore, installation times are significantly reduced since only half of the length of the heating cable is required compared to an equivalent single conductor heating cable.

Since the jacket materials are metals, connections to cold cables must be made by welding or brazing. Pentair Thermal Management offers the possibility to have the joints assembled by laser welding. This technology is available for all:

This allows maximum control of the welding process. The result is a very high quality and extremely reliable joint which allows the heating cables to be used at higher temperatures and / or loadings compared to conventional hand-made silver solder joints.