PFM 21 1 - Page 26

New Products
Fulton’s PURE Technology Approach Achieves
World-First Vertical Steam Boiler Design with Highest
Efficiencies and Ultra-Low NOx Emissions
he all-new gas-fired, vertical spiral-rib tubeless
steam boiler from Fulton, the VSRT, is the first
range to emerge from the company’s new ‘PURE
Technology’ approach, an initiative that has resulted in
a world-first design that is durable, long-lasting and
boasts the highest efficiencies and ultra-low NOx emissions as standard.
By adopting a systems-engineering approach to design
and implementing PURE Technology – the result of a
clean-slate design approach that combines new people
with new skills bringing a new approach to the design and
optimisation of heat transfer solutions – Fulton’s VSRT
radically challenges the heat transfer and mechanical design principles of traditional steam boilers. It is also claimed
by the company to be the most radical change to vertical
steam boiler design since Fulton pioneered the vertical
tubeless boiler in 1949 and, for the right application, a
worthy successor to the company’s renowned J Series.
Commenting for Fulton, sales and marketing manager
Leigh Bryan says: “To meet ever-more stringent industry
and environmental standards, our PURE Technology approach looks to enhance heat transfer, provide class-leading efficiencies, improve steam quality and reduce NOx
emissions. So rather than improve existing products to
achieve these goals, PURE Technology radically challenges conventional boiler design by engineering solutions that
are fit-for-purpose and applications.”
With over 15 patents pending in three continents, the
VSRT’s spiral-rib heat exchanger is a world first. 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.” says Leigh. “This optimises heat transfer to
create a longer-lasting boiler that we believe will beat the
competition in every category of durability!”
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 fullymatched with the VSRT in mind. This has helped Fulton to
achieve up to 10:1 turndown capabilities and industry-lead-
ing 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
With features including a tubeless design, no internal refractory and revolutionary cyclonic air filtration, the VSRT is
extremely easy to maintain and operate. For applications
where contaminated air can reduce boiler uptime – such as
laundry and dry cleaning – the VSRT’s cyclonic air filter
effectively separates debris and damaging particles from
the combustion air and, because it won’t clog over time,
eliminates the need for replacement filters. Maintenance is
further improved compared to other vertical boilers thanks
to the VSRT’s industrial control platform and easy access
to the pressure vessel.
The VSRT is currently available with outputs from 160 to
960 kg/h, complies with the City of London Air Quality
Strategy and anticipated MCPD regulations, is constructed
to BS EN 12953 and CE marked to PED. Its pressure
vessel and burner are backed by a five year guarantee as
For further information on the VSRT Series, call Fulton on
0117 972 3322, email or visit
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