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Bard 5651-207BX is an OEM thermal expansion valve (TXV) supplied boxed for service replacement on Bard wall-mount and packaged HVAC equipment. The TXV meters refrigerant into the evaporator coil based on load, helping maintain stable superheat, consistent capacity, and proper compressor protection when a valve is restricted, sticking, or leaking internally. This part is specified for R410A applications and uses 3/8 in x 3/8 in ODF connections, so matching the refrigerant type and line connection size to your unit is essential before ordering. As a genuine Bard replacement, 5651-207BX is intended to restore factory-correct refrigerant control and fit without improvising aftermarket substitutes.
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.