TPi April 2008

26 / 68

24 Tube Products International April 2008
developmentsproducts &
LITE aluminium flanges
LITE flanges from Fonderia
Fazzini are 30% lighter than
current aluminium flanges,
thanks to an exclusive truncated
cone shape, and they present
high strength, certified by
RWTüV.
The company states that the
flanges are also cheaper,
saving purchase, transport and
installation costs. LITE flanges
are compatible with ENPN10/16
standards and they provide an
alternative to traditional loose
flanges.
Fonderia Fazzini Srl – Italy
•
Fonderia Fazzini’s LITE flanges S S
Fluorflex universal hoses, developed by
HIS Schlauch- und Armaturentechnik,
Germany, in partnership with Fluortubing,
Netherlands, and ContiTech Fluid,
Germany, are constructed with an inner
liner made from DuPont™ Teflon® PTFE
62-N.
The liner is designed in the form of a
helically corrugated tube and therefore
permits very small bending radii. As
TobiasSautmann, CEOof HSI, explained,
“This enables installation space to be
significantly reduced, particularly with
large hose diameters (minimum bending
radius for DN 75 is 200mm). At the
same time, this flexibility allows hoses to
be fitted in extremely confined spaces,
where installation would previously have
been impossible.”
Teflon PTFE 62-N combines very good
flexural fatigue strength and stress crack
resistance with high thermal stability
and excellent resistance to nearly all
media used in food and pharmaceutical
production.
This often makes it possible to reduce
stock to just one type of hose. A
black conductive strip integrated
into the corrugated tube dissipates
static electricity. The tube can also
be supplied in an all-
white design, eg for
the pharmaceutical
industry, and with
an all-black (ie fully
conductive) inner liner.
The helical geometry
not only ensures
high flexibility but
also gives the
transported medium
angular momentum
that permits higher
conveying speeds
and shorter emptying
times. Thanks to the
inherent non-stick
properties of Teflon, the hoses are
easy to clean, even when carrying very
high-viscosity media. This, together
with the possibility of faster emptying
for cleaning or material changes, can
achieve cost savings in production.
Another advantage for users is the
ease with which the Fluorflex hose
system can be fabricated on-site using
safety clamps without the need for
laborious de-corrugation in a salt bath,
compressing sleeves or purchasing
the costly machinery required for this.
Since hose systems can be custom-
DuPont Fluorflex universal hoses have helically corrugated S S
inner liners made from DuPont Teflon PTFE
fabricated quickly in this way, it is usually
unnecessary to stock replacement hose
lines.
A multi-ply outer jacket comprising an
EPDM intermediate layer, a reinforcing
braid made from DuPont Kevlar® brand
fibres and a covering layer specially
tailored for the application protects the
Teflon inner liner from damage.
Besides EPDM black, the covering
layer can also be supplied in NBR
black for contact with oil and gasoline,
NBR black high temperature blend
for temperatures above 150°C, NBR
blue for food applications and EPDM
grey for pharmaceutical production.
New products are being developed for
transport, chemical engineering and the
construction industry.
Thewholesystem isdesigned forworking
pressures of 16 bar and continuous
service temperatures of 150°C. Designs
for even higher temperatures are also
possible. Fittings can be supplied in
many different materials (VA, PP, PVDF,
and different coatings such as PFA
und ECTFE) and with all currently used
connections.
DuPont – USA
HSI Schlauch- und Armaturentechnik
GmbH – Germany
Universal hose with corrugated
tube liner permits small
bending radii