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. Energy saving and efficient pump that will only supply demand as when needed; saves from 20 percent to 50 percent. Easy to set Variable Speed Drive 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. 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 professional staff to troubleshoot. Motor soft start; improving power factor and prolonging the service life of the water pump. 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. Operation; performance is reasonable; the average torque and abrasion on the shaft is reduced because of the decline for average speed in one day; the life of pump will be longer. Stainless Steel 0.75kW; 230V. Because it can realize the soft stop and soft start of the water pump; it can eliminate water hammer effect (water hammer effect means direct starting and stopping; liquid kinetic energy of a sharp change; lead to the great impact of the network; there is a lot of damage). 32x25MM 1.1KW 230V.