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Bard 905-0499 is a heating expansion valve assembly used in select Bard wall-mounted HVAC and heat pump applications to meter refrigerant properly during heating operation, helping the system maintain stable coil performance and correct superheat under varying load conditions. As an OEM Bard valve assembly, it is built to match the original capacity and connection style specified for the unit so technicians can restore reliable heating performance without guessing at aftermarket cross references. Because expansion valves are highly application-specific by model and refrigerant, confirm compatibility by checking your Bard unit model and serial information against the correct service manual or parts list before ordering.