Which pumps to use for heavy duty, high head application?
Some heavy and complex dredging operations require a high head, i.e. a high force of the pump. It is the ability to pump a high amount of cubic meters of water and solids to a certain height.
The head of a pump is conditioned by numerous factors, such as the diameter of the impeller, the rotation speed and the construction characteristics. This parameter is not affected by the type of mixture pumped, according to which the power of the pump must be chosen.
For example, when a pump is declared to have a capacity of 30 litres per second and a head of 50 meters, it means that the machine is able to pump 30 litres per second at a height of 50 meters (without considering pressure drops). We find the best solutions for high head pumping in heavy dredging work.
Types and characteristics of high head Dragflow pumps
The submersible pumps with Dragflow agitator for lifting and transporting solid material are also suitable for the most complex and difficult applications, thanks to High Head versions with high resistance and the ability to pump mixtures up to 70% solid by weight.
The medium range of Dragflow electric submersible pumps offers a wide spectrum of head and capacity, with high capacity versions providing excellent performance and low power consumption. It is possible to have up to 118 meters of head, with a maximum capacity of 4,000 cubic meters per hour and a sludge density of up to 1.7 tons/m³.
When greater power is required, it is possible to resort to high head Dragflow hydraulic submersible pumps, available in both High Head and High Capacity versions to ensure optimal results in any application context.
For example, our medium heavy-duty hydraulic pumps can also be installed on excavators, or mounted on cable dredgers of the DRH series, with a pumping capacity between 75 and 800 cubic meters per hour and a head up to 78 meters.
Dragflow also provides customised solutions, to take advantage of the right products and work with maximum efficiency even at high depths, including systems that can reach a depth of 200 meters, used for maintenance operations of underwater pipelines and other offshore structures.