The S49-AC series ultrasonic vibrating sieve (models 3030839 and 3030840) produced by Xinxiang Gaofu Sieving Machinery Co., Ltd. converts electrical energy of 220V, 50Hz or 110V, 60Hz into high-frequency electrical energy of 18KHz, which is then input into the ultrasonic transducer. The transducer transforms it into 18KHz mechanical vibration, thereby achieving highly efficient screening.