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Bard part 5651-220BX is an OEM expansion valve supplied boxed for service work on Bard wall-mount and packaged HVAC equipment. The expansion valve meters refrigerant into the evaporator coil based on system conditions, which helps maintain proper superheat for stable cooling, coil protection, and consistent performance. Replacing a sticking or restricted valve can correct symptoms like poor capacity, frosting, or erratic suction pressure, and using the correct Bard OEM valve helps ensure the connection size and calibration match the original application. Confirm compatibility by matching the part number to your Bard model and serial data before ordering, since expansion valves are system-specific by capacity and refrigerant circuit.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.