... Pressurized solar thermal system 1.SOLAR KEYMARK,SRCC,CE 2.Antifreezing -40 degree 3.OEM provide Split Pressurized solar thermal system1,Size ... PU,hailstone resistance: 25mmbracket: aluminum alloy, thickness: 3.0mmFeature:1.That collector can install anywhere, space is unlimited. on ... 55mm, density 120-140kg/m 3Copper Header TubeTU2, thickness: 1.0 mm, Hole spacing: 75mm, max operation pressure 6 bar ...