Lennox Y8735 TXV

The Lennox Y8735 TXV is a critical OEM replacement thermal expansion valve designed specifically for R410A refrigerant systems. Engineered for high-precision refrigerant flow control, this valve is compatible with 1.5 ton to 2.5 ton HVAC units, including air conditioners and heat pumps. It serves as a direct functional equivalent for discontinued or legacy part numbers including 12J18, 12J1801, 49L24, and 49L2401. Since the Y8735 is an externally equalized valve, it ensures the evaporator remains flooded for maximum heat transfer without allowing liquid slugging to reach the compressor. For technicians performing a cooling system repair, this kit typically includes the necessary Teflon washers and mounting hardware to ensure a leak-free seal. Maintaining proper superheat settings is simplified with this factory-calibrated component, which is essential for achieving the rated SEER efficiency of Lennox and Allied Air equipment. Always verify the evaporator coil compatibility and tonnage before brazing to ensure optimal HVAC system performance.

• Universal Compatibility: Seamlessly replaces multiple legacy part numbers including 12J18 and 49L24 for 1.5-2.5 ton configurations.
• High-Precision Metering: Specifically calibrated for R410A to provide stable superheat across varying load conditions.
• OEM Reliability: Built to original manufacturer specifications to ensure correct fitment within Lennox and Allied uncased or cased coils.
• Comprehensive Kit: Often includes Teflon rings and mounting straps to simplify the TXV installation process in the field.
• Enhanced Efficiency: Optimizes the refrigeration cycle, preventing evaporator freeze-ups and reducing energy consumption.

Is the Y8735 compatible with R22 systems?
No, this valve is strictly designed for R410A refrigerant. Using it in an R22 system will result in incorrect metering and potential compressor damage.

Can I use this 2.5-ton valve on a 1.5-ton unit?
Yes, the Lennox Y8735 is rated for a range of 1.5 to 2.5 tons. It will modulate correctly within this capacity range once properly installed and equalized.

Does this valve come with the required sensing bulb?
Yes, as a standard thermal expansion valve, it includes the sensing bulb necessary to monitor suction line temperature for real-time flow adjustment.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.