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Bard part 5651-214 is an OEM cooling expansion valve used in Bard wall-mount and packaged HVAC equipment to meter refrigerant into the evaporator coil and maintain stable superheat under changing load conditions. This 3/8 inch by 3/8 inch valve is a direct-fit replacement for the original metering device, helping restore normal cooling performance and protect the compressor when a valve is restricted, stuck, or out of calibration. Because TXV selection is application-specific, confirm the exact part number against your Bard unit model and serial before ordering to ensure proper capacity and refrigerant match.