Sigma Thermal
Sigma Thermal designs, engineers, supplies, and services process heating systems for various industries, including gas processing, petrochemical, power generation, aerospace, and more. Their product range includes thermal fluid systems, electric process heaters, direct-fired heaters, process bath heaters, biomass energy systems, and waste heat recovery solutions.
All Products(2)
Radiant–Convective Heater
A radiant–convective style heater is the most well-known and commonly used style of direct fired heater. These heaters utilize a bare tube radiant zone in combination with a bare / finned convection section. Vertical cylindrical, A-frame, and cabin style are the most common configurations. Sigma Thermal offers all types of radiant–convective heater designs including API 560 compliant systems.
Convection Heater
A convection style heater offers the benefits of a direct fired heater while eliminating some of the drawbacks associated with radiant heat transfer. Radiant heat transfer can be undesirable in certain temperature-sensitive applications as radiant heat transfer tends to be more intense and unevenly distributed around the coil surface. Sigma Thermal’s convection style direct fired heater utilizes a separate combustion chamber and flue gas recirculation to reduce combustion chamber temperatures to 1,400F, thereby minimizing the impact of radiant heat transfer to the process coil.
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