... stateDC 12V low voltage motorized ball valve for solar heating systemApplication:Solar thermal,under-floor,rain water,irrigation,plumbing ... life:100000 times.Application:Solar heating system,hot water heating and solar glycol loop),ideal for off-grid system. ... 4. Float ball structure,no leakage,especially suitable for heavy pollution conditions. 5.Good substitution for solenoid or pneumatic valve. ...