An expansion valve is a thermostatically controlled valve used in heating, ventilation, and air conditioning (HVAC) systems, as well as in some refrigeration systems, to regulate the flow of refrigerant into the evaporator. By controlling the rate at which refrigerant enters the evaporator, the expansion valve maintains optimal pressure and temperature, ensuring efficient heat exchange and cooling performance. The valve adjusts based on the temperature of the refrigerant, expanding or contracting to maintain a consistent flow. In plumbing applications, the expansion valve plays a critical role in systems that require precise temperature and pressure control, such as water-cooled chillers or hydronic heating systems. Proper sizing, installation, and maintenance of the expansion valve are crucial to achieving efficient system operation and preventing potential issues like coil freezing or insufficient cooling.
« Back to Glossary Index
« Back to Glossary Index