The global impact of COVID-19 on our people and the global economy is significant, and Watlow has taken a comprehensive approach to deal with the current crisis. Our contingency planning includes protecting our team members, communicating often with our customers and partners and maintaining the continuity of supply lines.

At the beginning of the pandemic, we set two priorities that guide our responses and decisions: the health and safety of our team members while continuing to supply essential products needed by our customers.

If you have questions about how the pandemic is impacting Watlow or Watlow’s response, please contact your Watlow representative.

Watlow Gas Regeneration Heater Helps Refinery Meet Clean Air Act Regulations

SIC 3822 - Petroleum Refining/EPA Compliance

heat exchanger


To comply with the Clean Air Act, a coal-fired power plant needed to heat flue gas to 455°C (850°F). The company had never used electric heat in its processes, so they were unsure how to specify their requirements.


Watlow engineered a customized design that would meet the customer's needs. This included:

  • Three large duct heater assemblies
  • Seven small duct heater assemblies
  • Five control panels

The large heater assemblies are rated at 375 kW (125 kW each). Each assembly has its own SCR power control, high-limit device and contactor for high-limit shutdown. Watlow custom manufactured the duct heaters and frames, building an extra-long stand-off section because of the high temperatures. The elements were designed to be individually replaceable, with a special seal to allow the system to operate at low pressure without leaking. Spare elements were wired in at the customer's request.

A skid assembly was also included for ease of mounting. To allow for thermal expansion of almost two inches (50 mm), slots were added to the base of the skid assembly.

The key to success in this application was Watlow's ability to provide the engineering expertise the customer lacked, and to add custom options that enhanced the overall performance of the system.