Circulation pump with long life, low noise, no leakage, enviroment protection, passed CE, ISO9000. 1.Working conditions:Rated voltage of power supply is 220V and frequency is 50 HZ single-phase AC.-Pressure of system ≤1.0MPa.-Pressure of water inlet ≥0.1Mpa.-Transmitted liquid should not include solid impurity the volume of which ratio exceeds 0.1% or the size of which is more than 0.2mm.-The ...