Non-pressurized Solar Water Heater
General product information
Features:Inner tank: Stainless Steel SUS304-2B
Outer tank:China Red,Sky blue, or white Painted Steel
Diameter of outer tank :φ460,φ480,φ500
Side cover: Black Side Cover, China Red side cover,white side cover, or aluminum allay side cover
Stands: Aluminum alloy
Inclination of stands: 45 degree
Reflector: No reflector
Foaming material: polyurethane foaming 50mm----70mm
All glass evacuated tube:φ471500 mm,φ581800 mm ,φ582000 mm, φ701800 mm, φ702000 mm,15, 16, 18, 20, 24,30,36 ,42pcs available
Volume of storage tank: 85L,90L,128L,130L, 138L, 155L, 184L, 220L ,288L etc.
Working Theory of Non-pressurized System:
Because proportion difference exists between hot water and cold water, cold water flows downward and hot water goes upward. In other words, hot water always floats on cold water because of its larger proportion.
In nonpressurized system, cold water in storage tank flows downward into the glass vacuum tubes, and there it is heated with the solar energy absorbed with the coating sputtered on inner tubes, and when cold water in glass tubes becomes hot, it rises upward back to storage tank because of the larger proportion, how much hot water rises upward to the top of storage tank, how much cold water will flow downward into glass vacuum tubes at the same time, hence the circulation presents in the nonpressurized system.
The water circulates constantly between storage tank and glass vacuum tubes as long as the energy is absorbed from the solar radiation, and in this way the cold water in storage tank becomes hotter and hotter. Eventually, all cold water in storage tank will be heated enough for a whole day ready for our daily use.
Optional Devices
Assistant tank, to automatically feed tap water into storage tank to keep it sufficient always
Electrical heater, as an auxiliary heating element in case of raining or snowing days so as to ensure a continous hot water supply
Intelligent controller, automatically controls water refill and startup of auxiliary heating device, more intelligent operation
Booster Pump, a choice for those area without tap water or with a unstable water supply
Warranty: 3 years international responsibility for integrated system and 15 years for glass vacuum tubes due to original quality problems