Hot Oil Boiler

In conventional thermal systems, water or steam is typically used as the heat transfer fluid.

However, in high-temperature industrial processes, using these fluids requires high operating pressures, which increases costs and introduces significant safety considerations.
The hot oil boiler solves this problem. Unlike hot water or steam boilers, it allows achieving high temperatures at low operating pressures. دمای بالا در فشار کاری پایین را فراهم می‌کند.

For example: Thermal oil at around 300°C operates at nearly atmospheric pressure, while reaching the same temperature with water or steam would require a pressure of approximately 85 bar.

Advantages of Hot Oil Boilers Compared to Water and Steam

• • Smaller system footprint

• • Lower fuel consumption

• • Easier installation and maintenance

• • No need for auxiliary equipment such as water softeners, deaerators, or condensate tanks

• • No heat loss due to condensation

• • No scaling issues

• • High corrosion resistance

• • Eliminates freezing problems

• • Higher thermal capacity

• • Higher thermal capacity

• • Longer service life and higher safety

Operating Temperature Range: 150–300°C

Sayal Band Hot Oil Boilers

Packaged hot oil boilers are designed and manufactured according to API and DIN 4754 international standards. Safety and performance optimization are strictly observed at all stages of production.

These boilers are available in capacities from 100,000 to 6,000,000 kcal/h, designed as three-pass systems and offered in both vertical and horizontal models.

Technical Specifications

• • High-strength fire-tube plate: DIN 17155-17Mn4

• • Seamless tubes compliant with DIN 17175-St 35.8

• • Welding performed according to WPS and PQR by certified welders

• • Electrodes: E7018 with proper preheating

• • Quality control tests: MT, UT, RT

• • Hydrostatic testing at 1.5× design pressure

• • Delivered as a complete package including:

  • o Boiler

  • o Burner

  • o Circulation pump

  • o Feed pump

  • o Supply tank

  • o Expansion tank

Advantages of Sayal Band Hot Oil Boilers

• • Insulation with 128 kg/m³ ceramic wool, 100 mm thick

• • No use of concrete or refractory mass

• • Compliance with NFPA safety standards

• High thermal efficiency

• • Coil design resistant to thermal shock

• • Tolerates temperature differences up to 50°C at oil inlet and outlet

• • Use of dedicated burners

• • Easy operation and maintenance

• • Optional installation of a recuperator for increased efficiency

• • Thermal stress relief for pressure parts