The Variable Frequency Pressure pumps is suitable for all kinds of water plants; pressure stations; hotels; residential areas; and other high rise buildings. Very popular to customers for high volume conditions. Big energy saving and efficient pump that will only supply demand as when needed; saves from 20 percent to 50 percent. Easy to set your Variable Speed Drive that ensures a constant pressure by regulating the speed of the motor as the demand varies. Dry run protection included. Constant water pressure. This prolongs the service life of the pipe network and easy installation. It can be accustomed to various environments and pump installations. Simple operation: fool style operation. All functions can be finished by a button; no need for any professional staff to troubleshoot. Motor soft start; improving power factor and prolonging the service life of the water pump. Wide voltage range: The pump can work stably when the voltage range is 160V-250V. Highly integrated design; combining the inverter system; control and protection cooling and sensor system. The vessel ensures the pump can switch off if there are small leaks on the system. The air pressure must be maintained at 60 percent of set water pressure to ensure correct operation. Stainless Steel 0.75kW; 230V.