Lennox 12J20 TXV Kit

The Lennox 12J20 TXV Kit is a critical OEM component for maintaining precise superheat control in high-capacity residential and light commercial systems. Engineered for 3.5 to 5-ton R410A air conditioning units, this kit features the high-performance Danfoss 067U3416 thermostatic expansion valve. Designed to regulate refrigerant flow with extreme accuracy, the 12J20 expansion valve prevents compressor liquid slugging while maximizing evaporator efficiency across a broad range of operating conditions. The valve utilizes a standard Chatleff connection and an external equalizer to ensure stable performance even in variable load scenarios. As a genuine Lennox replacement part (also identified as 104110-03), this kit includes the necessary hardware for a complete field installation. For service technicians, utilizing this R410A TXV 5-ton kit ensures that the indoor coil operates at peak thermal exchange levels, preserving system subcooling and preventing the high superheat issues often associated with sub-standard aftermarket metering devices.

• Precision Refrigerant Metering: Optimized for 3.5-5 ton cooling capacities to maintain exact superheat levels.
• OEM Compatibility: A direct factory replacement for Lennox 12J20 and 104110-03, ensuring a perfect fit with Chatleff-style indoor coils.
• R410A Optimization: Specifically calibrated for the pressure-temperature characteristics of R410A refrigerant systems.
• System Protection: Includes an integrated check valve and external equalizer to prevent compressor damage and improve oil return.
• Robust Construction: Features a high-grade Danfoss power element for reliable modulation under demanding thermal loads.

Is the 12J20 compatible with smaller 2-ton units?
No, this specific kit is calibrated for 3.5 to 5-ton capacities. Using this valve on a smaller system will likely lead to over-feeding and potential compressor flooding.

Does this kit include the Chatleff fittings?
Yes, the Lennox 12J20 TXV Kit is designed for standard Chatleff connections commonly found on newer Lennox indoor evaporator coils.

Can I use this valve on an R22 system swap?
This valve is specifically designed for R410A pressure ranges. It should not be used on R22 systems as the internal spring rates and orifice sizing are not compatible.

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.