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An expansion valve is a precision component that regulates refrigerant flow in response to system conditions. In heating and cooling applications, this valve is essential for achieving accurate temperature control and energy efficiency. When sourcing boiler spare parts or burner spare parts, a reliable expansion valve ensures that the refrigerant expands correctly before entering the evaporator. This part is commonly used in heat pumps and air conditioning units, and its proper function is vital for overall system performance. For technicians focused on boiler maintenance and repair, selecting a compatible expansion valve is key to restoring optimal operation.