Custom Machine Assembly & Equipment Fabrication

Specializing in Industrial Ovens & Heat-Treating Processes

Kono Kogs, Inc. (KKI) is pleased to announce that we are now offering custom metal fabrication and machine assembly services as part of our total solution supplier approach to meet the ever-increasing needs of both our existing and growing customer base.

With our team’s decades of experience and expertise in industrial ovens and thermal oxidizers we can meet nearly any metal fabrication need: from structural frames and sheet metal to fully assembled, wired, and piped industrial equipment. Engineering design services as well as PLC cabinet design and programming are also available.

With state-of-the-art refurbishing and fabrication facilities in Green Bay, our assembly and fabrication capabilities primarily serve customers located in Wisconsin, eastern MN, Northern IL & Northern IN but are certainly not limited to this area alone.

Contact Chris (Buster) Heikkila to request a quote:

920-309-0725 /

industrial heating coil enclosure with insulation and cladding
Heating coil enclosure with insulation and cladding

Assembly & Fabrication Capabilities

Kono Kogs offers custom equipment design, fabrication, and full assembly of:

stacks of rolled and flanged industrial ductwork with -15” w.c. rating
Rolled, flanged ductwork, -15″ wc rating
  • Combustion chambers
  • Media chambers
  • Media cold face support
  • PLC cabinets
  • Instrumentation tubing
  • Gas trains (assembly & testing)
  • Pneumatic piping (installation & testing)
  • Insulation & cladding
  • Structural steel frames
  • Sheet metal assemblies
  • Process ductwork/supports
  • Exhaust stacks
  • Process T-dampers
  • Access platforms

Our capabilities include:

  • Sheet metal fabrication
  • Structural steel fabrication
  • Sub-system testing
  • Prep and paint to customer specs

Examples of our work:

technician working on a welded steel assembly for an industrial heating coil enclosure
Welded assembly of a heating coil enclosure
custom industrial bypass damper fabrication
Custom fabricated process tee dampers
VOC rotary concentrator assembly in progress
VOC rotary concentrator assembly in progress
structural steel support frame in Green Bay metal fabrication shop
Fabrication of a structural support frame
35-foot freestanding exhaust stack assembly
Freestanding exhaust stack assembly
technician using plasma cutter to modify exhaust stack
Exhaust stack modification in progress

Fabrication case study: Emergency Thermal Oxidizer Fabrication

Facility & Equipment Specifications:

  • 76,000 SF total fabrication and assembly space
  • Overhead cranes: 5, 10, 15 and 20-ton
  • Fully ventilated paint booth: 16’W x 34’D x 12’H
  • CNC press brake: 12’ 175 ton; forms 18 gauge-7 gauge @12’ L
  • Plate roller: up to .375” mild steel @ 6’ W
  • Welding machines (8): 2019/2020 Miller: MIG, TIG, Stick
  • Plasma Table: 6’x12’ water; cut 1” steel & .75” stainless steel
  • Plasma Cutters: (2) Hand Hypertherm; cut 1” steel & .75” stainless
  • Shear: 13’ CNC; cuts up to .25” mild steel with a 35” back gauge
  • Ironworker: FI-85/140 Scotchman; hole punch/shear 1” steel
  • Band Saw: Hydraulic Horizontal; up to 10” diameter material
  • Tapping Station: FlexArm; .25”- .625” holes
  • Jib Hoists: 3 @ 1 ton
assembled industrial heating coil enclosure painted red
Heating coil enclosure, assembled & painted
internally insulated square industrial ductwork fabrication
Internally insulated duct (2300°F rating)
valve drive assembly with gear box and prox switches
Valve drive assembly: gear box, prox switches
custom industrial ductwork fabricated in Wisconsin
Custom ductwork: flanged/stiffened

Serving the Midwest’s Thermal Equipment Manufacturers

Kono Kogs’ fabrication and assembly services provide responsive, cost-effective solutions to suppliers of industrial process furnaces and ovens, including:

VOC rotary concentrator assembly complete with burner and electrical controls
VOC rotary concentrator assembly with burner & electrical controls

Outsource a full project to Kono Kogs or let our services function as an extension of your own capabilities when facing large orders, equipment downtime, labor shortages or rush turnarounds.

Why Kono Kogs?

Kono Kogs, Inc. has earned a reputation as a trustworthy and reliable supplier of air pollution control, thermal processing equipment and related systems utilizing our specialized skillset that translates into more cost-efficient fabrication results.

With our extensive background in oxidizer upgrades and rebuilds we can even provide design assistance with ductwork, isolation and process T-dampers, stack platforms and mezzanines, and controls upgrades.

Fabrication Capabilities Brochure

Additional Project Photos

click for a full-size image

final assembly of custom electric drive for regenerative thermal oxidizer valve custom fabrication of electric drive for RTO valves custom designed electric drive for RTO valves rolling mild steel ductwork at a metal fabrication shop in Green Bay, WI fabricating crows nest for RTO exhaust stack custom crows nest for RTO exhaust stack before assembly custom designed crows nest for RTO exhaust stack fully assembled and ready to be installed direct thermal oxidizer components before assembly initial fabrication staging for direct thermal oxidizer two welders fabricating a direct fired thermal oxidizer in Green Bay, WI welder fabricating direct fired thermal oxidizer exterior seams direct fired thermal oxidizer design during fabrication side view of direct fired thermal oxidizer design during fabrication three welders fabricating an emergency rush direct thermal oxidizer large metal components for direct thermal oxidizer being fabricated sheet metal fabrication of thermal oxidizer components direct fired thermal oxidizer insulated combustion chamber fabricated in Wisconsin preparing newly fabricated direct fired thermal oxidizer combustion chamber for insulation and cladding adding insulation to direct thermal oxidizer combustion chamber during fabrication custom industrial Y-ductwork designed and fabricated in Green Bay, WI sheet metal industrial ductwork fabrication machine assembly of direct thermal oxidizer components industrial metal fabrication of direct thermal oxidizer in progress preparing to weld structural steel support for thermal oxidizer assembly of insulated combustion chamber and exterior components of thermal oxidizer custom industrial metal fabrication of thermal oxidizer direct thermal oxidizer on support frame in workshop during fabrication process custom industrial exhaust stack design and fabrication fabrication of custom industrial transition duct from rectangular to round design and fabrication of mild steel inlet mixing box with internal insulation for regenerative thermal oxidizer design and fabrication of mild steel ductwork for industrial application custom fabrication of mild steel ductwork with bolted flange completed PLC control cabinet for thermal oxidizer PLC control panel for thermal oxidizer PLC control panel wiring for regenerative thermal oxidizer wiring layout for PLC control panel exterior view of PLC controls cabinet with doors open exterior view of PLC control cabinet with doors closed industrial PLC control panel design, layout and testing industrial PLC controller wiring inside cabinet PLC electrical cabinet for industrial application stainless steel T-damper fabricated in Green Bay, WI stainless steel diverter damper design and fabrication stainless steel damper manufacturing interior of stainless steel diverter damper manufactured in Wisconsin custom designed and fabricated VOC rotary concentrator machine after assembly

For additional fabrication images and details, please see:


Contact Chris (Buster) Heikkila to request a quote or more information:
920-309-0725 /

Drawings can be sent in via  separately