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