We build heat treating solutions your company can afford.

Provide us with your material, temperature range and volume, and we’ll build a cost-effective heat treat solution that will serve you night and day for years to come. We believe that designing a furnace requires an understanding of your process requirements, budget parameters, floor space restrictions, product recipe, throughput and adherence to certifications.

Designed to your specs

When you buy a one-size-fits-all furnace, you pay for features you don’t need. Diablo’s built-to-order heat treating furnaces deliver all the features you need and none of the features you don’t. The result is a simple and dependable workhorse that is matched perfectly to your requirements.

Built within your budget

Have an old furnace that fits nicely in your plant layout but isn’t meeting your needs anymore? Diablo can rebuild and re-control your old furnace to the modern specifications you need, for pennies on the dollar. Diablo retrofit packages range from basic upgrades and improvements, to a completely customized, state-of-the-art rebuild.

Proudly Designed & Made in the USA

Whether you choose rebuilt, upgraded, or brand new, all Diablo equipment is made with the highest quality materials, using proven designs, by exceptional people, right here in the United States of America. Our furnaces undergo rigorous testing, ensuring reliability from the start.

We've got it all covered

Offering IQF, temper/draw, box and car bottom furnaces, along with washers and accessory equipment.

Internal Quench Furnace
Temper/Draw Furnace
Box Furnace
Car Bottom Furnace
Dual & Single Washer
Safety Upgrade
Functional Upgrades

Need a Safety Upgrade on Your Existing Internal Quench Furnace?

Safety standards change yearly, so upgrading your IQF to meet current NFPA standards is critical. Whether it is flame relays for burn-offs or adding closure block valves, Diablo Furnaces is your source. We even upgrade furnaces that are only 5-years old to meet new NFPA standards.

Some Safety Upgrades Include:

  • Update flame safety guards to meet standards
  • Add flame relays for quench burn-offs
  • Mount additional switches on side of J-boxes
  • Route open wiring into conduit to protect from excessive heat
  • Add proof of closure block valves
  • Add high/low gas pressure switch
  • Kick plate for gantry platform
  • Electrical and re-piping for respective areas

Other Upgrades Include:

  • Reline IQF furnace with new brick (including hard-brick hearth)
  • Four-piece castable hearth
  • Controls
  • Electrical
  • Gas to electrical conversion
  • Combustion upgrades
  • Preventative maintenance
  • Service