Home > Compact Solar System > Non Pressurized Solar System

150Liter Non-pressurized Solar Water Heater

150Liter non-pressurized solar water heater details: 

Model: FD-NP58-18B 

How non-pressurized solar water heater works
1. Non-pressurized solar water heater of all glass evacuated tube collector integrated with storage tank, are ideal for use in houses and other applications where cheap, reliable hot water supply is required. They are simple, economic and practical. 
2. As the specific gravities of hot water and cold water are different, cold water goes downward and hot water goes upward. 
3. When cold water in evacuated tubes is heated, it becaomes lighter and goes to the water tank, while cold water in the tank goes down to the evacuated tubes 
4. Through this circulation, the cold water in the water tank will be gradually heated.

Non-pressurized solar water heater features  
1. Cheap and reliable solution, Simple structure, Easy installation 
2. High efficiency 
3. Withstands water pressure no more than 0.1MPa 
4. Operated without any power supplying 
5. Electric heater can be used as back up in rainy days 
6. Hot water can be used directly, or can be used as a pre-heated 

Non-pressure solar water heater optional accessories 
1. Assistant tank: 3/5/8/10/12/15/20L 
2. Controller 
3. Electrical heater: 1.5/2/2.5kw


Non-pressure solar water heater specification


 Non-pressurized solar water heater

 Material of out tank

 0.31-0.4mm thickness color steel/ fluorine carbon steel

 Material of inner tank

 Food grade 0.31-0.4mm thickness SUS304 stainless steel

 Tank insulating layer

 55mm 45kg/m³ high-density polyurethane foamed

 Inlet and outlet hole

 Male G 1/2, 3/4

 Max pressure

 0.05 Mpa

 Solar collector tube

 3.3 Borosilicate glass with N/Al coating

 Thickness of glass tube


 Vacuum tube tightness

 P<=0.005 Pa



 Emission ratio


 Idle sunning property parameters


 Average heat loss coefficient



 1.5mm thickness Galvanized Steel

 Structure of tank:

 5 holes for air vent,overflow,water inlet and outlet,electric heater


 Argon arc welding

 Fastening pieces:

 Made of stainless steel screw

 Absorber area

 1.875 m²

 Tube quantity

 18 tube 58x1,800mm

 Tank capacity


Contact Us

Message should contain 20-3000 characters.3000 Characters Remaining.

Related Products