Flatcollector solar water heaterType Area(m2) Vacuumtube TankVolume (liters) Φmm Length(mm) Qty(pcs) 58*1800 2.00 58 1800 16 130 2.25 58 1800 18 145 2.50 58 1800 20 160 3.35 58 1800 24 190 3.85 58 1800 30 240 Wecanproduceaccordingtoclients'detailedrequirementsandalsodoOEM. Heat Pipe Brief Indtroduction Evacuatedtube with copper pipe, and there is anti-freeze liquid inside as medium transfering heat. 1. Diameter and length: 58mm / 1800mm 2. Glass material: Borosilicate glass 3.3 3. Tube thickness: 1.6mm or 2.0mm 4. Resistant hail: 25mm or 38mm 5. Life span: 15 years to 20 years Heat pipe solar collector brief information 1.vacuum tube size: 58*1800 2. stand frame:qualitygalvanized steel 3.insulation layer:polyurethane foam 4.quantity of heat pipe tubes in a collector: from 10 pieces to 30 pieces 5.working pressure:0.6Mpa 6.life span: 15 to20 years