... SUS304-2B.3. Stand: galvanized steel with painting, or aluminum alloy, or stainless steel.4. Water tank heat insulation layer: 50-60 ... thermo siphon principle, the hot water rise up, and arrive in the water tank. The cold water inside the water tank go down the solar ... kilometers away from Shanghai and 60 kilometers away from Hangzhou, with convenient transportation. Our company covers an area of 2, 000 ...