motorized ball valve 12V, DN20, with manual switch, 2 way, electrical valve,brass ... motorized ball valve DN20, 12VDC, 2 way, brass, with manual switch. Application:1.HVAC 2.Water treatment 3.Chemical ... suitable for heavy dirt and long time no action.3).The conditions that solenoid valve can not be ... (fully closed) motorized ball valve 12V, DN20, with manual switch, 2 way, electrical valve,brass