Solar expansion vessel Sunex 10bar

Expansion vessel for solar

Expansion vessels are an important component in every heating, cooling, solar and domestic hot water system.

Application

The expansion vessel is one of the safety components for closed solar thermal systems. Expansion vessels can be used in all types of heating systems (provided this is technically feasible).

Basic properties

• Compensation for changes in the thermal expansion of the solar fluid in solar systems caused by temperature changes.
• Maintaining the solar fluid pressure of heating systems at a specific level.
• Possibility of increasing the initial pressure of the vessel by pumping up the gas part of the container.
• The pressure inside the container can be reduced by means of a valve.

Design: Solar expansion vessel 10 bar  Sunex

Expansion vessels are welded steel vessels whose interior is divided into two parts by an elastic diaphragm: gas and water. The gas section is equipped with a pressure regulating valve. The water section is filled with the heat transfer fluid from the solar thermal system.

The correct pressure in the gas system stabilizes the pressure of the entire central heating system (the system changes its volume while maintaining a constant pressure). Expansion vessels for solar thermal systems are typically supplied filled with gas at a specific pressure. During installation, it is necessary to adjust the pressure in the gas section to the heating system's requirements. The minimum operating pressure is 0.5 bar.

Expansion vessels can be used in heating systems with an operating temperature of up to 100°C. Heating systems with expansion vessels must be equipped with a safety valve, thermometer, and pressure gauge.