NAO has over 2,000 refractory molds and we also offer encased burner blocks with a steel shell.

  • Fast deliveries
  • Standard / special shapes…
    refractory blocks, muffles, distribution cones
  • Alloy encased, downfire and low NOx
    recirculation blocks
  • Extensive stock of cast blocks & molds for custom
    burner blocks/muffles made by NAO & other manufacturers
  • Custom metal molds for any shape or form
  • Standard options: reinforcing needles, pre-fired curing

Are your refractory tiles or blocks causing operational & efficiency problems or worse (flame impingement on furnace or heater tubes)?

NAO can solve your refractory problems… Contact Us

With over 100 years of experience NAO has earned a worldwide reputation for reliability and trouble-free performance.