The pumps of H-V-HD range are of centrifugal multistage design with arrangement of its stages in line one behind other one in a number corresponding to required delivery pressure. They are intended for pumping in severe conditions, mainly as boiler feed pumps. Applications: The pumps H-V-HD are used as boiler feed pumps for handling treated water of temperature up to 120 °C, to repump condensates or deliver liquids of higher temperatures at higher delivery head and at maximum acidity pH 7. In any case the lowest delivery head 80 m must be ensured for the right function of balancing disk.