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The Bard 905-0634BX TXV Assembly (boxed) is an OEM thermostatic expansion valve assembly used in Bard wall-mounted HVAC equipment to meter refrigerant into the evaporator and keep superheat under control across changing load conditions. A properly functioning TXV is critical for stable suction pressure, coil performance, and compressor protection, so this assembly is a smart replacement when you are seeing symptoms like poor cooling, frosting, or erratic system operation tied to refrigerant feed. Bard 905-0634BX is also listed as a direct replacement for older Bard part 905-0350, making it a dependable choice when updating an existing repair with the current OEM number.
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.