Non-pressure Solar Water Heater By Haining Hengji Solar Energy Technology Co.,ltd.

The basic Non-Pressure Solar Water Heater is a passive system, which relies on a natural principle-Thermosiphon. There is water in evacuated tubes and free to flow into tanks. When the water in tubes is heated by sun' ray firstly, this makes water in the tubes lighter. therefore the cold water in the tank move downwards and hotter water move upside into the tank. It is an open circuit since the aair vent and the overflow pope is open to the air.
All the storage tanks are tested before leaving with tested pressure of 0.05MPa(0.5bar) but the operation pressure should be 0MPa. The daily efficiency is over or equal to 50% normally and 42%in water. We welds the inner tank by high-frequency ring or argon arc techniques.
Specification(we can customize according to customers requirement):
-inter tank:SUS 304-2B food grade stainless steel with thickness of 0.31-0.4mm
- Out tank:stainless steel/galvanized steel/colour steel
-Capacity:50-350L
- Evacuated tubes:dia.47mm*1500mm,58mm*1800mm
-Insulation layer thickness:55mm
-Bracket:galvanized steel with thickness of 1.2-1.5mm
-Heat preservation:72hrs
-Hail resistance:25mm
-Working pressure:0MPa