... collector 2012 tope sale solar super heat pipe thermal collectors with new design(SRCC,CCC,CE,ISO,CGC,Keymark) Characteristics:1.All the ... by heat transfer medium liquid .With the heat pipe in the Vaccum tube ,so no water will flow in the Vaccum tube ... arbitrarily to meet the demand of large water consuption,and also could be combined with existing pipeline.5.Each tube can work ...