... for fluid transporation and pressure control equipment such as fan,water pump,air compressor,etc.It adopts advanced control philosophy,controls output ... ,it eliminates the throttle resistance of baffle,let the fan and water pump always keep optimum working state,and save much ... 280KW375520P1-43315380V/315KW420610P1-43400380V/400KW535732 frequency inverter for constant pressure water supply cooling fan