Importance of Circulation Heaters in Biodiesel Industry

Circulation heaters are one of the most energy efficient and ready-made means of installing electric heating elements with minimal amount of labor and time. The task of heating liquid is accomplished by combining vessel, heating elements, terminal enclosure, outlet and inlet connections, insulation and mounting brackets.

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They are designed with ANSI flange heater or NPT screw plug assemblies with pressure tanks (vessels) in order to heat liquids, air or gases for performing different projects. They are either ideal for side-arm or in-line operations because they have direct fluids held in a container with high quality heating elements to provide even heat distribution and fast response. These immersion heaters are provided with thermocouple sensors that control the temperature and keep the heater safe from overheating. Circulation heaters are especially designed for:

  • Water heating
  • Heat transfer
  • Freeze protection
  • Gas heating
  • Stea air
  • Fuel oil heating
  • And many more

Use of Circulation Heating in the Biodiesel Industry

These heaters are normally used in biodiesel industry where companies need to heat the circulating, pressurized liquid. A screw plug immersion heater or a flanged heater is immersed into a pressure vessel, which is called pipe body. This vessel releases its heat into the fluid thus increasing its temperature to the desired level. This approach is really helpful in enhancing the performance of normal immersion heaters. Most of the circulation heater manufacturers have also added different types of thermostats to enable companies easily manage their projects without overheating their equipments.

Circulation heaters have proved to be ideal for biodiesel industry, where they are capable of pumping viscosity, pre-heating fuel oil, increasing temperature of the medium and for closed loop heat transfer systems. They have standard ratings from .5 kilowatt to 565 kilowatt that work in different sheath materials, pressure ratings, watt densities and chamber materials. Picking the right circulation heater for biodiesel manufacturers is critical for efficiency. Companies in densely populated areas such as Illinois and Indiana use these immersion heaters to address viscosity issues.

Benefits for Biodiesel Heating

Since circulation heaters are highly efficient and compact equipments, they can be ideally used in natural or forced circulation system to heat flowing liquids or gases. Their installation is also simple as it only requires some basic piping and wiring connection knowledge. These immersion heaters have the following benefits for biodiesel industry:

  • Pressure ratings up to 2500 PSI
  • ANSI Class 150 or ANSI Standard NPT connections
  • Highly efficient in heat transfer
  • Heater can be flanged or screw plug
  • Constructed with stainless steel and has ASME or Canadian Vessel Registration i.e. CRN approved
  • Different housing options- like NEMA 1, NEMA 4, NEMA 4X, NEMA 7 (Explosion Proof)
  • Explosion proof
  • Idea for chemicals, corrosive solutions, steam, oils, gases

Since biodiesel industry is a huge place for using circulation heaters, companies find them worthy when it comes to the following procedures:

Heat Transfer Oils

Circulation heaters are used as closed loop heat transfer systems, molding platens and dies for heat sensitive materials

Fuel Oil Heating

They are capable of pre-heating fuel oil for burners and pumping viscosity.


Circulation heaters can be easily used for rinsing and dishwashing, process water, hot water storage tanks and jacketed kettles

Steam, Gases, Air

Biodiesel companies use circulation heaters to increase temperature of gases, superheating steam and process air.