What is Tank-in-Tank technology?
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Introduction
What is Tank-in-Tank technology?
A simple and effective
concept delivering
outstanding reliable
performance.
Primary Water
Insulation
Domestic Hot
Water
ACV UK is a subsidiary of the ACV International
Group that has been designing, manufacturing and
marketing technological systems for hot water
generation since 1922. ACV International was
founded in Belgium and pioneered the Tank-in-Tank
concept – a cutting edge design providing
exceptional performance.
All products are manufactured on two production
sites in Belgium and in the USA. Through fourteen
subsidiaries and a broad network of specialised
distributors, ACV has a presence on all five
continents.
Most ACV products are based on the Tank-in-Tank
concept. This technology gives our products
exceptional performance in hot water and heating
generation.
Today, ACV offers innovating products that fulfil all
the demands of a modern world, thanks to the
advanced exclusive technology; we offer solutions
that are reliable, high performing, economical and
environmentally friendly.
Introduction
The Tank-in-Tank is a DHW tank entirely immersed
within an outer tank which contains the primary fluid,
with the inner tank itself being a stainless steel heat
exchanger. The corrugated wall of the inner tank forms
a large heat exchange surface that can heat the
domestic water in a very short time. It also provides a
uniform temperature throughout the volume of the
tank. Since the inner tank can move freely, it can
expand and contract under changes in pressure and
prevent limescale forming on the surface.
This simple and highly effective design allows specifiers
and installers to benefit from the cost advantages of
ACV’s high volume production while taking comfort
from the fact that the system they are specifying or
installing is the best available.
Key Features
• A specially designed stainless steel hot water
cylinder enclosed within an outer tank which is
heated by the boiler
• The inner tank also acts as a large thermal store, and
is surrounded by primary hot water. Recovery is
exceptionally fast because the heat transfer surface
is so large
• The internal cylinder is designed to operate at up to
10 bar - suitable for any kind of application, mains
pressure or vented
• Sides of the cylinder are corrugated which increases
the heat transfer area. Expansion and contraction in
use shrugs off scale deposits
• Each draw-off causes natural turbulence keeping
particles in suspension
• Stainless steel construction means no anode
protection, no contamination, leaking or sludging
caused by cracked glass linings. Water held at
consistently higher temperatures discourages
growth of Legionellae bacteria
ACV Seneffe, Belgium
Head Office & Distribution, ACV UK
