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For technical and sanitary reasons,
sewer channels are frequently cleaned.
Particularly, the blocking of the
cross sections as well as odour problems
need to be avoided. Also,
damages at the channel walls must
early be recognized which is only possible
if the walls are completely clean.
Further, inorganic deposits that reduce
the sewage treatment efficiency
must be removed.
Since more than 35 years, water
jetting, introduced by WOMA under
the name 'Duisburger Verfahren', is
state-of-the-art in sewer cleaning.
The WOMA high-pressure water jet
technology is suitable for the
following applications in the sewer
technique:
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Removal of incrustations and impurities from sewer channels. |
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Cleaning of sewers and collecting drains of different profiles and wall materials. |
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Removal of deposits, sand and sludge from channel bottoms. |
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Removal of drain skins from sewer walls. |
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Treatment of concrete and brick linings in channels. |
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Removal of worn protective coating systems. |
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Cleaning of sludge troughs and sand catchers. |
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Removal of chemical deposits (e.g. calcium carbonate). |
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Flushing of blocked channels. |
Why High-Pressure Water Jets? |
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Method works independent on the channel profile. |
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Guarantee of channel aeration. |
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Disburdening of operators from manual, dirty and insanitary jobs. |
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High cleaning efficiency even in areas of difficult accessibility. |
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Possibility of combining cleaning and suction. |
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Minimum traffic obstruction. |
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Reduction of the number of gully holes to be opened. |
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Sensitive treatment of the wall materials. |
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Reduction of cleaning cost. |
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Possibility of partially mechanized cleaning. |
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Cleaning of selected parts of the channel construction (e.g. bottom, certain cross sections, complete channel). |
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Adaptation of cleaning on amount and degree of impurities. |
The Material Range |
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Using high-pressure water jets,
among others, the following materials
can reliably be removed:
Cement and
lime residues, coatings, concrete, corrosion
products, deposits, drain skins,
impurities, oxide layers, roots, sediments,
sludge.
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The Technique |
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WOMA offers stationary and mobile
high- and ultra-high pressure water
jetting systems with operating pressures
up to 3,000 bar and water flow
rates up to 1679 l/min, consisting of
electric or combustion drive, highpressure
plunger pump, guiding and
control devices, water tools, and highpressure
accessory.
Also, for operating
pressures up to 400 bar and
power ratings up to 780 kW, abrasive
resistant pumps (ARP®) are available
for dealing with impurified water.
The special high-pressure program for
sewer applications also includes the
following components:
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Vertical high-pressure plunger pumps for the installation in municipal vehicles. |
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High-pressure guns in modular design for cleaning and decoating of man-sized channels and gully holes. |
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Self aligning oscillating nozzles for cleaning channel bottoms. |
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Channel cleaning nozzles with several orifices. |
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High-pressure valves for impurified water. |
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Flexible high-pressure hoses with large cross sections. |
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Round and fan shape nozzles. |
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Reel systems for sewer cleaning hoses. |
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Removal of cement-based flat coat in man-sized channels by high-pressure water jet tools
Combined suction-cleaning vehicle for sewer cleaning with reel, high-pressure cleaning nozzle and suction hose
Water jetting nozzle for sewer cleaning
Abrasive resistant high-pressure plunger pumps ARP®for sewage water
Pneumatically controlled 3/2-way valve for municipal applications
Sewer channel bottom cleaning with a Skip Jack nozzle
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