Universal steam boiler UL-S, UL-SX

The UL-S is a highly efficient steam boiler with a three-pass design for 1,250 to 28,000 kg/h of steam at up to 30 bar. With impressively low emissions and its ability to be converted for biofuels or hydrogen, the UL-S is designed to be future-proof.

Very high efficiency for all output ratings from 1,250 to 28,000 kg/h for low running costs and emissions
Complete system with customer-specific equipment and future-proof technology
Extremely well proven design “Made in Germany”, highly durable and easy to maintain
Consistent steam quality for reliable supply
Custom designs available for heat recovery boilers, hybrid or superheated steam
Smart boiler control and seamless system integration with digital assistants

Design now Steam boilers brochure

Benefits

Very high efficiency for low running costs and emissions

Thanks to the integrated economiser, the UL-S uses the energy supplied even more efficiently, saving up to 7% on fuel. An optional condensing heat exchanger can also recover almost all of the waste heat and reduce the flue gas temperature to up to 50 °C. Very low emissions (to below 50 mg NOx) are possible thanks to the large furnace.

Customised equipment and design with future-proof technology

The UL-S is individually configured for your application, and manufactured and equipped for easy planning and quick installation. The boiler and burner technology work effectively together, even when using multi-fuel firing systems. The technology can be retrofitted to run on climate-neutral fuels such as biogas, bio-oil or hydrogen at any time.

Extremely well proven design, highly durable and easy to maintain

The Bosch UL-S boiler design with asymmetrical arrangement of flame and smoke tubes results in natural water circulation for rapid heating and a dynamic response. The German-made construction has proven itself thousands of times and is particularly durable and easy to maintain thanks to its excellent accessibility.

Consistent steam quality for reliable supply

Thanks to the high steam chamber and three-component control, the UL-S offers excellent pressure consistency and steam quality, even when the steam demand fluctuates significantly. This optimises boiler operation and ensures reliable availability of the process heat. The Bosch system is particularly well suited to the food and manufacturing industries.

Custom designs and superheated steam options available

Bosch also offers the UL-S as a heat recovery boiler with firing and fourth pass for the proportional use of waste heat or as a pure heat recovery boiler. Another option is a hybrid boiler with an electrical heater rod for green electricity. The UL-SX can be fitted with a superheater module for use as a superheated steam boiler for steam turbines, as an example.

Smart boiler control and seamless system integration

The Bosch BCO boiler control system lets you easily control the UL-S using a touch display. The boiler system is compatible with all the usual process control systems. The optional efficiency assistant and protected remote access facility allow seamless Industry 4.0 integration. All control systems come pre-configured, fully wired and tested.

Technical Details and Documents

Choose product variant

Documents
Data sheets	Download now
Steam boilers brochure	Download now
Technical data
Heat transfer medium	High-pressure saturated steam
Design	Three-pass single-flame tube/smoke tube technology
Output	1,250 to 28,000 kg/h
Safety pressure	up to 30 bar
Max. temperature	up to 235 °C
Fuel	Gas, oil, bio gas, bio oil, hydrogen