On-site workhorses
PUMPS
feature of the 72 m
3
/h capacity pump is that it can be operated
without use of electric power.
Flexible shafts pumps provide power transmission along curved
or adjustable axes, and Paclite says this design is common for
dewatering projects on sites where there is no electric power.
The pumps are particularly popular for rental applications and
intermittent use, it added.
Ken Gorsun from Paclite said the Force pump could take
aggregates as large as 19 mm and offered a rugged heavy duty
design. They feature a vortex type pump with hardened steel
impeller.
Paclite uses abrasion resistant hoses, built up from eight
layers of spun steel, which are designed to resist corrosion and
environmental contaminants such as aggregates and oil.
Force is the heavier weight class model of the two pumps
produced by Paclite, and the company said that it was big enough
to allow larger stones and aggregates to be dewatered.
Mr Gorsun described the Force model pump as autonomous,
portable and lightweight, so that it could be used in “a multitude
of applications”.
Meanwhile, Tsurumi’s latest diesel driven pump, the
4TBA82D135 which was launched earlier this year, is one of the
company’s biggest models.
Designed to work in the most demanding dewatering and
Mr Cantuba added, “In the future,
we plan to expand our sludge/trash
pump range to include larger 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.”
Smaller package
Thompson Pump meanwhile is now offering a ‘Compact’ range
which has the features of the company’s JSC in a smaller package,
with less weight, fewer parts, less maintenance and a lower price.
The company says its Compact pump is -35% smaller and
-20% lighter but offers the same performance as a standard size
pump with 24-hour run time fuel tank. Available in the most
common diesel-drive portable pump sizes of 4 in (102 mm) and
6 in (152 mm), the Compact series features a system exclusive
to Thompson which keeps the pumpage (water & wastewater
especially) from discharging into the environment.
The Compact series is also available with automatic start/stop
and ‘Silent Knight’ sound attenuation, among other options.
Meanwhile, 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. A key
international
construction
november 2013
48
>
Part of Atlas Copco’s
Weda range. The latest
addition at the small
end is the 04S.
The Paclite Force
can handle
solids as large
as 19 mm.
Swedish bypass
Preventing interruption during sewer replacement was crucial
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 contractor Peab 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 150 mm inlet capacity and one with 250 mm inlet capacity. The bypass pumping
system had to cover an area of 80 m which
in turn required approximately
320 m 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 180 m 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.
