Solar Water Heater Replacement/ Spare Vacuum Tubes

Our high-performance 1.8-meter solar vacuum tubes are the core component of modern solar thermal systems. Engineered with advanced triple-target gradient coating technology, these tubes are designed to maximize solar energy absorption while minimizing heat loss, ensuring a reliable and efficient supply of hot water for residential, commercial, and industrial applications. The vacuum tube operates on a simple yet highly effective principle:

• Selective Absorption: The inner layer of the glass tube features a special solar-absorbing coating. This coating captures solar radiation and converts it into heat.
• Heat Transfer: The heat is then transferred to the water (or heat transfer fluid) inside the inner tube.
• Thermal Insulation: The vacuum layer between the two concentric glass tubes acts as a perfect insulator. It virtually eliminates conductive and convective heat loss, allowing the tubes to perform excellently even in cold or windy weather. This is the key to their high efficiency.