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The Bard 5651-225BX Expansion Valve is an OEM metering device used in Bard wall mounted air conditioners and heat pump systems to regulate refrigerant flow into the evaporator for stable superheat, proper coil feeding, and reliable capacity control. Replacing a restricted, leaking, or improperly feeding valve can help correct symptoms like poor cooling, coil freeze ups, hunting pressures, or repeated low suction conditions. Because expansion valves are application specific by refrigerant type and tonnage, match 5651-225BX to your exact Bard model and serial number, and have a qualified technician confirm system charge and install practices, including correct bulb placement and insulation, to restore factory performance.
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.