motorized ball valve 12V, DN20, with manual switch, 2 way, electrical valve,brass Description:This listing includes 1 unit ... of motorized ball valve DN20, 12VDC, 2 way, brass, with manual switch. Application:1.HVAC 2.Water treatment 3.Chemical process 4. ... position, automatically power off, the valve remain fully open position. 2.Connecting SW and CLOSE, the valve close, getting the position, ...