... brass, with manual switch. Application:1.HVAC 2.Water treatment 3.Chemical process 4.Small equipment for automatic control 5.Replacing ... , the valve opens, getting the position, automatically power off, the valve remain fully open position. 2.Connecting SW and CLOSE, ... the valve remains side passes position (fully closed) motorized ball valve 12V, DN20, with manual switch, 2 way, electrical valve,brass ...