I.Technical parameters 1.Function environment: temperature 0-40 degree, relative humidity: ≤90%RH, power supply 220V/50Hz, it can operate continuously. 2. centrifugal pump use 20SG2.5-15G type tube centrifugal pump, rated power: 0.37KW, rotary speed: 2800r/min, Suction:8m, efficiency: 34%, fluid: 2.5m3/h, lift:15m, experiment range is widely, it will appear cavitation phenomenon obviously. 3. ...