... combined with solar collector, pressurized storage tank, intelligent controller, solar station, expansion vessel, pipeline etc. 1. Collector: S01, or U ... 3. SP-106, SP116, SP328, SR962, SR962 …solar working station. 4. SR868, SR868C8Q…temperature differential controller CE EN12975 KEYMARK Split ... of empty evacuated tubes)260~300 °CAverage heat lossULT 0.4~0.6 W/(m2 *°C)Hail resistanceØ25 mm 24mm ...