... , such as water heater. It can start working at zero differential pressure. This type of valve can change the coils to be ... ,4,,16,20,25,35,40,507) Working Pressure: 0~0.7MPa8) Max. Proof Pressure: 1MPa for NC, 0.8MPa for NO9 ... TypeOperation Fluid Viscosity20CST BelowWorking Pressure2W:1.0/2WH:3.5Max. Pressure ResistanceAir 0~0.7, Water 0~0.5,Oil,0 ...