Submersible borehole pumps

Submersible borehole pumps are used for pumping groundwater both for household use and for the gradual extraction of excess groundwater reserves. If necessary, the borehole pump can also be used for pumping other liquids without mechanical impurities. If there is a larger amount of sandy material and other abrasive substances in the borehole, the water borehole must first be cleaned, for example, with a Malyš submersible vibration pump. Submersible pumps are fully submerged in water (below the dynamic water level of the borehole), from where they push the water column up to the draw-off points, allowing them to pump water from depths of up to 150 metres. This distance is called the delivery head (denoted as H) and, along with the flow rate (the volume of water pumped, denoted as Q), is among the important parameters for selecting a submersible water pump. Both values are provided by the manufacturer and vary for different types of pumps, so it is important to choose a submersible water pump specifically for the particular conditions of the borehole. Submersible borehole pumps are designed for long-term immersion and are manufactured from a diameter of 74 mm, making them suitable for very narrow boreholes. However, it is necessary to leave sufficient space between the pump casing and the borehole wall. The flow of surrounding water ensures the cooling of the pump, which gives the deep borehole pump high performance and provides a constant water supply. If the necessary cooling of the borehole pump cannot be ensured by water flow, the same effect can be achieved by installing a cooling jacket. When selecting a submersible borehole pump, it is also important to consider the yield of the borehole (otherwise, the pump could run dry) and other factors that affect the lifespan of the pump. Submersible pumps with a frequency converter can adjust their performance to achieve constant water pressure even in the event of fluctuations in the electrical grid voltage. An advantage of the submersible pump is its easy installation, which is possible both vertically and horizontally (a stainless steel cable is used to suspend the pump in the borehole). The pump includes a connecting cable, which can be extended if necessary for deeper boreholes. Before purchasing a submersible borehole pump, do not forget to prepare your borehole for water pumping, and then simply choose from a wide range of submersible pumps from leading manufacturers such as Grundfos and Wilo.