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VSRT - Vertical Spiral Rib Tubeless Boiler


The VSRT (Vertical Spiral Rib Tubeless) boiler, the world’s first fully wetted, refractory-free vertical tubeless boiler and the new standard for industrial steam boiler design.

It attains industry-leading heat transfer rates thanks to its unique spiral design, which achieves low stack temperatures by passing the flue gases through a spiral-wound heat exchanger that is fully immersed in water.
This all-new spiral-rib design benefits from an extended heat transfer path and dual-direction heat flow, with the spiral annulus designed and optimised to create high heat transfer rates. 

The ground-breaking spiral rib heat exchanger design not only allows Fulton to improve boiler efficiency but, with virtually zero thermal stress, a thick walled construction and featuring vertical tubeless design architecture, the VSRT is one of the most durable steam boilers available.
It features a fully water-backed pressure vessel, which is wrapped in high-density insulation to achieve minimal thermal losses and low outer surface temperatures. The tubeless design has also enabled Fulton to create a compact boiler with minimal footprint. No refractory also means significantly lower weight (compared to traditional vertical steam boilers) for ease of installation.

Ultra-low NOx emissions of less than 20ppm are achieved thanks to the VSRT's combustion technology, which features a modulating burner and furnace that have been purposely-designed as a single component and fully-matched with the VSRT in mind. This has helped Fulton to achieve up to 10:1 turndown capabilities and industry-leading performance of >82.5% gross thermal efficiency and 99.75% steam quality at 8 bar. When correctly sized for applications, the exceptionally high turndown will result in savings above and beyond those gained from the stated efficiencies.
With features including a tubeless design, no internal refractory and revolutionary cyclonic air filtration, the VSRT is extremely easy to maintain and operate

VSRT boilers are PURE Optimised and built to last as a reliable source of clean steam, providing cost savings and operator peace of mind for years to come.

  • kW rating: 100 - 1250 kW

  • Output (BHP): 10 - 125 BHP

  • Output (kg/h): 160 - 1956 kg/h (F&A 100°C)

  • Operating Pressure: 10.34 barg

  • Industry Leading Efficiencies

  • Smallest Footprint in the Industry

  • Fully-Wetted Pressure Vessel

  • 10 Year Guarantee on Pressure Vessel

Fulton VSRT Steam Boiler
VSRT Image

Watch Video:

VSRT YouTube Video
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