Non-pressure solar water heater
Non-pressure solar water heater is a kind of compact system of solar collector and water storage tank. The whole system relies on the different density of cold water and hot water, thus Non-pressure solar water heater also called thermal- siphonal solar water heater.

The system can work without the circulation pump and no heat pipe connection. The cold water directly filled into the vacuum tubes, the vacuum tubes gather energy and heat the cold water, the lighter hot water rise up into the water tank and cold water come down then be reheated. That how the water do circulation by itself. Please see for its workprinciple.

Non-pressure solar water heater system is most economical and suitable product for low latitude country and regions, especially for Asian, Africa, , Oceania, South America and South part of North America.

Optional accessories: Controllor and electrical heater.
Product information:
Product model: XK-NP
Vacuum tube: 47-1500mm, 58-1800mm co-axial structure high borosilicate 3.3 glass vacuum tube.
Inner tank material: SUS304-2B Stainless Steel with thickness of 0.4mm.
Outer tank material: Color powder coating steel / Stainless steel.
Frame: Galvanized steel plate with thickness of 1.5mm
Aluminum plate with thickness of 1.0mm
Stainless steel with thickness of 1.2mm.
Frame angle: 25degree, 38degree or 45degree
Capacity of water tank: 90L~324L.
Heat preservation layer: High pressure automatic polyurethane foaming layer with thickness of 55mm.
Heat preservation: 72 hours
Hailstone resistance: Dia¡Ü25mm