Thermal Oil Heaters

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 is accepted and where reliability is the keyword.

The heater solution from RA is not characterized by low purchase price – but instead, low over-all costs including low maintenance and operational costs, and long lifetimes.

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

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 a minimum of 10 bar pressure with capacities in the 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. However, at high temperatures that are often required in process heating systems, water and steam require a corresponding high operating pressure. Consequently, high-temperature heating systems with water and steam can be very controversial and expensive – both concerning personal safety issues, economy, design, and project.

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 of 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)