... flange long life, low noise, no leakage,high performance CE,ISO90001. Hot water circulation pump with flange 1.Working conditions:Rated voltage of power ... and frequency is 50 HZ single-phase AC.-Pressure of system ≤1.0MPa.-Pressure of water inlet ≥0.1Mpa.-Transmitted liquid should not ... heating system and it can be used to supply water and add pressure for mansions of city, villa of suburb, house, to ...