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Sites hosted on make use of cookies for a variety of different purposes. Cookies may be set by the site that you are visiting (known as ‘first party cookies’), or by other websites who serve up content on that site (‘third party cookies’). They ensure a consistent and efficient experience for visitors, and perform essential functions such as allowing users to register and remain logged in. They are widely used to ‘remember’ you and your preferences, either for a single visit (through a ’session cookie’) or for multiple repeat visits (using a ‘persistent cookie’). Dredging a mixture of rock and stones, for instance, requires an impact-resistant pump with a larger spherical passage, while sand has highly abrasive qualities where extreme wear-resistant materials are the best option.ĭo you want to know more about dredge pumps or which type is best for what situation? Please leave a comment or go to the Equipment Selector.Ĭookies are small pieces of data, stored in text files, that are stored on your computer or other device when websites are loaded in a browser. The soil that needs to be dredged is also a deciding factor when selecting the shape of the dredge pump and the material it is made of. The required production rate for a certain project in relation to the pipeline configuration, dictates the capacity of the pump, which is expressed in maximum cubic metres per hour. When choosing a dredge pump, the power, efficiency, capacity, resistance to wear, reliability, maintainability and general robustness, are essential features. When slurry has to be transported over long distances through a pipeline, booster stations containing additional dredge pumps can also be added to the system. In addition to those on board, CSDs can also be equipped with a submergible dredge pump for extra production and improved suction capabilities. The ones contained in the pump room are mainly used for discharging the vessel via rainbowing or pumping ashore. When a TSHD is equipped with an underwater pump, the loading of the hopper is usually done with the submerged pump without the help of the pump(s) in the pump room. A TSHD, for instance, can be equipped with one or two pumps in a pump room and/or a submergible dredge pump in the suction tube. Small dredgers normally have only one dredge pump, whereas bigger vessels can accommodate multiple pumps. At the discharge end of the pump, an overpressure transports the slurry up the discharge line. At the inlet/suction pipe, an underpressure or vacuum sucks up the slurry. The impeller can be compared to a fan that displaces air and, by doing so, it creates a centrifugal force. The discharge of the dredge pump, mostly situated at the upper side of the pump, is connected to the discharge line. The front side of the pump casing is closed using a suction cover, to which the suction tube is connected. The impeller is mounted into the pump casing and connected to the drive motor through a shaft. In TSHDs, dredge pumps transport the soil to the hopper and are also used to discharge it via pipelines or rainbowing.ĭredge pumps are centrifugal pumps, which mainly consist of a pump casing and an impeller. Without them, slurry transport wouldn’t be possible, and cutter suction dredgers (CSDs) and trailing suction hopper dredgers (TSHDs) wouldn’t exist.ĭredge pumps create a vacuum that sucks the soil from the seabed up into a suction pipe and, in the case of CSDs, pushes it all the way to the discharge site via a pipeline. Dredge pumps are the beating heart of hydraulic dredgers, giving life to the whole vessel.
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