Thermal fluid systems provide a solution for thermal fluid heating sometimes referred to as thermal oil heating, a type of indirect heating where a liquid phase heat transfer medium is heated and circulated to one or more heat energy users within a closed loop system. Thermal fluids offer the user the capability of high temperature operation (up to 600F with organic thermal oils and 800F with certain synthetics) at very low pressures. Due to the low operating pressure and properties of thermal oils, most heaters are built to ASME Section VIII, and a licensed boiler operator is not typically required.

The Sigma Thermal HC product line offers two types of standard thermal fluid heating system packages, the HC-1 and the HC-2. For customized needs, we offer engineered thermal fluid heaters. Contact one of our application engineers and let us help you decide which solution is right for your project.

Many people around the world refer to these systems by different names. The phrases thermal oil heater, thermal oil system, thermal oil boiler, thermal fluid heater, thermal fluid syste, thermal oil boiler, hot oil heater, hot oil system, and hot oil boiler generally all refer to the same type of closed loop liquid phase heat transfer system. Note that many people use the terms thermal oil boiler or thermal fluid boiler even though most systems do not involve any type of vaporization.