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An expansion valve body is a key part of the refrigeration circuit in heating systems, controlling the flow of refrigerant into the evaporator. This component works in conjunction with an expansion valve coil to regulate pressure and temperature, ensuring efficient heat exchange. In boilers and heat pumps, the expansion valve body must be durable and precisely engineered to maintain system performance. When servicing heating equipment, replacing a worn or faulty expansion valve body can restore proper refrigerant metering and improve overall efficiency. This spare part is essential for maintaining the reliability of modern heating systems.