We are a professional enamel hot water tank / solar water heater manufacturer with ISO,EN12975,Keymark,CCC Solar WaterMark GUV, and CE certificate in Changzhou, China.

Solar hot water systems supply an average 80-90% of a household annual water heating needs. With nearly 1/3 of the average electric or more than 1/2 of gas bill devoted to heating water, a solar hot water system is the best choice and smart investment you can make for your house and for the environment.

Low Pressure Open loop Steel Solar Water Heater  is a kind of solar water heater systems that the bellow collector directly connect with the above water tank. This solar water heaters do not need to run the pump to force and do not require pipeline connections between the collector and the tank . This is a simple and secure way to collect solar energy. This working principle of solar water heater is make it natural circulation between the water tank and the collector pipe . After the water in vacuum tube heated, natural convect into the water tank, meanwhile cold water in the tank flows down to the vacuum tubes, that is natural to run continuously to heat the water tank

Specifications:

1. Inner tank:

1.1 Materials: Stainlesss steel or Enameled steel
1.2 Welding procedure: completely auto welding;

2. Outer tank
2.1 Materials: galvanized steel 0.4mm
2.2 Production procedure: sheet are jointed-up after crimping;

3.Insulation layer
3.1 Materials: polyurethane , environmentally friendly
3.2 Procedure: Using CNC constant temperature, constant pressure quantitative foaming, curing processing, thick insulation layer, ensure the quality more close, well-balanced, insulation more abiding.

4. Supporting stand
4.1 Materials: Color steel, 1.5mm

4.2 Tilt degree: 30 degree, 45 degree

5.Evacuated tubes

5.1 Size: 58mm - 1800mm
5.2 Absorber coating: AL-ALN or SS-ALN-CU

6.Packing: Export standard Cartons

Please note: Inner tank of NB-series is stainless steel SUS304, Inner tank of NC-series is enamel steel.