32
CONSTRUCTION EUROPE
OCTOBER 2013
PUMPS
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– also meant that the WEDA 04S pump was
easily portable from one dewatering task
to the next. This is a key requirement for all
contractors that are looking to move regularly
between jobsites.
Abet Cantuba, product marketing manager
pumps for Atlas Copco Portable Energy, said,
“Our product range already included the
WEDA 04, a 0.4kW drainage pump, but we
received requests for a small pump that could
also handle solids. Our answer is the WEDA
04S.”
Cantuba added, “In the future, we plan to
expand our sludge/trash pump range to
include larger kW power nodes which will be
able to pump higher flows and handle larger
sizes of solids.
“This will be important for applications in
mines and municipal sewers.”
The Atlas Copco WEDA small range pumps
also comprises the WEDA 04 and WEDA 08
drainage pumps; the WEDA 04B residual
pump that draws water down to 1mm; and
the sand- and mud-resistant WEDA 08S
sludge pump.
The CE-compliant 50Hz variant of the
WEDA 04S is available now from the Atlas
Copco Portable OEM Solutions factory in Bad
Oeynhausen, Germany.
The CSA-UL standards approved 60Hz
version, meanwhile, will be available in early
2014.
Paclite Equipment, part of Singapore-based
Uni-corp, is offering a submersible flexible
shaft pump for the draining and removal
of water from trenches and building sites
without use of electric power, with a capacity
of 72m
3
/h.
Ken Gorsun fromPaclite said the Force pump
could take aggregates as large as 19mm and
offered a rugged heavy duty design.
FLEXIBLE SHAFT
Flexible shafts pumps are said to provide
rotary power transmission along curved or
adjustable axes.
Paclite claimed these pumpswere frequently
used in dewatering on sites where there was a
lack of electric power.
The pumps are particularly popular for
rental applications and intermittant use, it
added.
Paclite quality uses abrasion resistant
hoses, built up by no less than eight layers of
special spun steel. This material is said to not
only be corrosion resistant, but also able to
withstand environmental contaminants such
as aggregates, fluid and oil.
The Paclite models feature a vortex type
pump with hardened steel impeller.
Swedish bypass
A new bridge will link the Kolonnvägen
area of Stockholm, Sweden, to the new
Arena City – which will include residential
and commercial buildings, and the Mall
of Scandinavia, set to be Scandinavia’s
largest shopping destination – in
September 2012, construction and civil
engineering company, Peab, began the
process of building the bridge abutment.
As 75% of Solna’s water and wastewater
pipes lay directly underneath the
proposed location of the abutment,
these needed to be replaced with a new
pipe and sewer system. To prevent any
interruption of wastewater transport
during construction of this new piping
system, Xylem was tasked with designing
a temporary, customised bypass solution.
Erik Nordqvist, project manager for
Xylem Sweden, said, “The challenge was
to devise a system capable of dealing
with extremely heavy flows of between
200 and 600 litres/s. To manage this, we
installed four of Xylem’s powerful Godwin-
brand diesel pumps – three with 150mm
inlet capacity and one with 250mm inlet
capacity. The bypass pumping system had
to cover an area of 80m which in turn
required approximately 320m of pipe.”
He said that the work involved removing
extensive surface water in addition to the
already heavy flow of wastewater.
“To cope with this additional surface
water we incorporated three of Xylem’s
Flygt 3153 pumps into the system
design, pumping the water to a container
equipped with larger capacity Flygt 3202
pumps. These powerful pumps then
transported the wastewater 180m away,”
said Nordqvist.
It took three weeks to construct the
bypass pumping system. The pipe work
was laid and pumps operational within
one week, with pumping continuing for
a period of two weeks while the new pipe
and sewer system was being installed.
Xylem had to design a temporary,
customised bypass solution
The Paclite Force pump can take
aggregates as large as 19mm
Subaru says that among the most
important daily checks is the quality
and level of engine oil
