Thermal Oil Heaters (also called Thermal Oil Boilers, Thermal Fluid Boilers, Hot Oil Units) are developed and designed especially for demanding process heating  operations where no compromise on quality are accepted and where reliability is the key word.

The heater solution from RA are not characterised by low purchase price – but instead low over-all costs including low maintenance and operational costs, and long life-times.

Oil & Gas-fired Unit

Consequently Oil heaters are made of first class material and component, without any compromise on quality. The pressure part are designed as standard between 10 bar (although operation often are atmospheric and unpressurised).

The heaters for thermal oil or heat transfer fluid (HTF) are delivered as complete and fully equipped units with all necessary armatures, instrumentations and safety features.

The thermal oil heaters are delivered as oil-fired, gas-fired, or dual fuel. The models are designed for minimum 10 bar pressure with capacities in normal range up to 500 kW, – and up to 4000 kW.

Water and steam are typically used as heat carriers (heat transfer fluid) in heating systems. But at high temperatures which is often required in process heating systems, water and steam requires a corresponding high operating pressure. Consequently high temperature heating systems with water and steam can be very controversial and expensive – both in relations to personal safety issues, economy, design and projecting.

In thermal oil heaters, a special oil-based fluid is used instead of steam or water as the heat carrier. With this oil it is quite simple to achieve operating temperatures up to 250°C at atmospheric pressure. Comparing to water and steam, this would require a pressure above 85 bar to obtain this temperature.

There are several advantages by using thermal oil compared to steam systems. The most obvious are:

  • High temperatures up to 250°C at atmospheric pressure
  • Optional temperature level set-points
  • No pre-treatment required
  • No heat loss (in form of condensate and flash steam)

No risk of corrosion and no risk of freezing damages.

  • Low maintenance costs
  • Quiet in operation (no steam stroke and flash steam noise)
  • Easy to operate (does not require steam boiler certified staff)