Metal Coating / Can Coating

April 27, 2020


A metal coater / can coater was expanding. The new facility had several ambient airstreams and several hot airstreams to treat. If mixed, the hot emissions from the inside bake oven (IBO) and pin oven containing high boiling point solvents would condense out when mixed with the cooler emissions drawn from the inside spray area. Condensate inside ductwork and RTO components leads to low reliability, extensive cleaning, fan balancing problems, and presents a fire hazard. Reliability and knowledge of the customer’s process were to be the critical factors in the choice of a supplier for this project.




Clean Switch 70,000
Used Regenerative Thermal Oxidizer
70,000 scfm capacity (2012 vintage)




Kono Kogs had a wide variety of RTO sizes and technologies available in our inventory. The MEGTEC Clean Switch RTO was the best match as a base system. The Durr-MEGTEC Systems Clean Switch RTO is a proven performer for a wide variety of emission airstreams. The low pressure drop of the system, the robust design, combined with an innovative rotary switching valve make it the system of choice for rotary valve RTOs.

A rotary switching valve was a specific customer requirement for this project. Poorly tuned or poorly designed poppet valve can tip cans over in the ovens causing unacceptable production line shutdowns. Rotary valves produce little-to-no pressure pulses.

To accommodate the mixing of cold and hot air sources, a mixing box was added prior to the RTO and the fan was relocated to the exhaust end of the RTO (induced draft design). A PLC upgrade to an Allen Bradley Controllogix platform was also included, along with remote monitoring capability.

Kono Kogs provided the shipping of the RTO to site, rigging and mechanical assembly on the customer’s pad. We also provided all power and control wiring, as well as, gas and compressed air piping and commissioned the RTO and supplied an extensive spare parts package.


RTO met or exceeded all customer demands for this can coating project. This was the second of several successful RTO systems provided to this customer with the same configuration. We are grateful for the continued confidence from one of our many repeat customers.

Overheard customer comments:

I thought we bought a used system. That’s not used….or is it?”
Customer (upon delivery of the RTO)

Equipment / Services provided by Kono Kogs, Inc.
Additional Equipment/Updates:
  • Mixing Box
  • Induced Draft Fan (reconfigure)
  • New Exhaust stack
  • PLC Upgrade (Controllogix)

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About Kono Kogs

Kono Kogs has been refurbishing used thermal oxidizers for over 25 years with over 350 installations in nearly every state in the USA and every continent (we are only waiting for an opportunity in Antarctica). We offer full refurbishing of quality-built thermal oxidizers and stand behind them with warranties that match new equipment OEM warranties.