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Intertec has developed a range of steam heaters for field instrumentation protection applications.

Offering a choice of vertical, horizontal or panel-mounting styles, with four power outputs ranging from around 65W to 490W, users can select the appropriate heater for all common enclosure-scale freeze/condensation protection or temperature maintenance applications.

The range has been developed from the most popular sizes of finned convection heater profiles in the Intertec electrical heater range.

These Intertec-designed anodised aluminium profiles have been field-proven in various enclosure heating applications.

Steam heating is still employed in many refineries and other plants as steam energy is produced as a byproduct of the core process and because it is a simple alternative to electric heating, according to the company.

Two of the options in the new Intertec steam heater range are designed to mount vertically to provide convection heating.

They are physically compact and suitable for smaller-scale heating requirements; in freeze protection applications, the outputs are typically 65W and 130W respectively when used on normal lines, offering steam at a pressure of 3bar and a temperature of 130C.

A third convection option is designed to mount horizontally and provides a typical output of 490W.

The fourth element has both flat and finned sides to allow it to be mounted against a panel or on the side of equipment; it delivers around 200W of combined convection and conduction heating output, providing a design alternative for some process applications.

The sizes of the four heaters are 5 x 5 x 15.5cm, 8 x 8 x 22.5cm, 22.5 x 21.3 x 10cm and 5 x 21.3 x 22.5cm.

The steam heating elements are identical in size to those used in the Intertec electrical heating range, although they come with a press-fitted 12mm OD stainless-steel tube for connection to the steam/hot-water service line.

This compatibility is intended to simplify the configuration of an environmentally protected enclosure, allowing users to work through the specification process in exactly the same manner regardless of whether steam or electrical heat sources will be employed – choosing the style and size of enclosure, calculating the power requirements and selecting the right shape and size of heating element.

The new products complement an existing selection of finned tubes that Intertec offers for small-scale freeze protection applications.

The heating elements may also be used with hot-water lines and for temperature maintenance up to 40C typically when used with a thermally actuated control valve.

This stainless-steel accessory is tamperproof and can maintain a desired set-point temperature to within +/-1 degree typically.

Further accessories available to support the new heaters include steam traps.

In addition to supplying steam heater components to instrumentation engineers and system builders, the company is able to supply complete pre-fabricated ‘hook-ups’ for field-based plant instrumentation.

The turnkey service covers the complete concept-to-installation process, including engineering design, assembly and onsite delivery.

A typical application is a field instrumentation node such as pressure or differential-pressure transmitter(s) – supplied complete with a manifold, tubing connections and the appropriate style of enclosure and environmental protection.

This approach can improve the performance and reduce the lifecycle costs of field instrumentation because of the nature of the designs utilised and the use of a modular range of building-block components, according to Intertec.

Intertec Hess

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