... close:3 seconds. Fail safe(auto-return) function, The best alternative to the solenoid valves ... solar glycol loop),ideal for off-grid system.Domestic water,Irrigation systemUnder-floor heating systemLow ... and machinery limit design,accurate position,avoid gear with switch. 3. Multi-angle assembling,easy to ... worked in moist conditions. IP65. Situable for :IC card meters,heat energy meters,air-warm valve. ...