In case you didn’t know, the solar expansion tank tends to be larger than the hydronic expansion tank. This is because the temperature in a closed-loop solar water heating system is 50°F to 60°F higher, which translates into thermal expansion that is 4-10 times greater than the expansion in a comparable hydronic water heating system. This means the solar expansion tank needs to absorb more expanded water than a hydronic heating system does. This accounts for its larger size.

Built to DIN4757 standards, the Solar-DEZHI series expansion tank can meet the needs of most solar heating systems currently in operation across the globe. This expansion tank assembly consists of a water tank, an extra intermediate tank, and all necessary pipe fittings.

The uniquely designed membrane inside the expansion tank is made of synthetic rubber to tolerate a high temperature of 212°F in the solar heating system.

Solar Expansion Tank

Technical Specifications
Maximum working pressure: 10bar
Maximum operating temperature (diaphragm): 100°C
Maximum operating temperature (system): 120°C
Color: white, red

The intermediate water tank comes fitted with an inlet valve that is placed in the front of the tank. This expansion tank provides heat dissipation, which effectively reduces the working temperature and thus extends the life of the tank.

Installing our solar expansion tank is easy, as it takes 40% less room and 50% less installation time.

Features of Expansion Tank
1. The Solar-DEZHI series expansion tank is mainly used as a pressure tank in solar water heating systems, hydronic water heating systems, and water pumping systems.
2. This solar expansion tank comes with a top-grade butyl rubber diaphragm, food grade PP liner, and a grade 304 stainless steel connector.
3. Spray painted tank surface has a uniform color.
4. Leak-proof valves deliver excellent air tightness.
5. The solar expansion tank has gone through 24 hours of tests for pressure and air tightness to ensure each tank is as good as it gets.
6. 304 stainless steel connecotor
7. Food grade PP liner
8. Top-grade butyl membrane
9. Automatic painting
10. Sealing performance test for 12 hours.
11. Leak-proof valves deliver excellent air tightness.

Technical Specs of Expansion Tank

Expansion tank for solar heating system applications.
Stainless steel fittings. Pre-charge: 40PSI(2.7bar)