Forced convection technology uses high-temperature fans to circulate hot air inside the furnace, allowing the hot air to exchange heat directly with the glass surface. After the retrofit, the achievable results include: significantly improved flatness of clear glass, elimination of white haze defects, higher loading rate, higher yield, and shorter heating time for clear glass.

Replacement is recommended in five cases: the chamber size cannot meet order requirements, the furnace body is severely deformed or corroded, the service life is too long (typically over 15 years), a completely different process route is required (e.g., switching from flat glass to bent glass), or the retrofit cost exceeds 50% of a new furnace.

Five assessments: furnace body structure condition, heating system status, on-site measurement of insulation performance, drive and roller conveyor precision, and foundation and workshop conditions. Southtech provides a free on-site assessment, a customized Retrofit Plan, and a commitment to before-and-after data comparison.

Yes. Mainly through retrofitting the heating and convection system, optimizing the drive system, increasing quench air pressure, and upgrading the control system to shorten cycle times, production capacity can be increased by 10%–30%. However, the increase is capped by the original maximum load capacity.

Through insulation upgrades, sealing optimization, heating system renewal, and power regulation optimization, energy consumption can typically be reduced by 5%–15%; combined with control system upgrades and process optimization, the reduction may be even greater.

The project delivers three direct benefits: a high degree of automation, efficient energy saving, and traceable quality. Southtech provides a full set of intelligent upgrade capabilities, including adaptive heating temperature, automatic air pressure adjustment, automatic matching of process parameters, and energy consumption data analysis. It supports MES system integration, helping the production line become smarter and more efficient with less reliance on manual labor.

Buying a used tempering furnace carries significantly higher risks than buying new. The core risks center on aging of the furnace body, outdated convection system generations, obsolete control systems, higher energy consumption, and the lack of warranty and original-manufacturer service.

Yes. Common retrofit directions include converting a radiation furnace to forced convection, upgrading the control system, renewing heating elements and insulation, and capacity enhancement. When the retrofit cost is below 40%–50% of buying new equipment and the main structure of the furnace remains intact, retrofitting is usually more economical than purchasing new.