Lennox 56J19 TXV

When you are dealing with fluctuating superheat or a restricted orifice on an older R22 system, the Lennox 56J19 Thermal Expansion Valve Kit is the technician's choice for restoring precise refrigerant metering. This genuine OEM Lennox Flo-Rater TXV is engineered for high-pressure heat pump and cooling-only applications ranging from 1.5 to 3 tons. Unlike standard fixed orifices, this thermostatic expansion valve dynamically adjusts to evaporator load, preventing liquid slugging and ensuring the compressor stays protected from floodback. Featuring a non-bleed port design and a Chatleff connection, it integrates seamlessly with existing indoor evaporator coils. The kit includes an 18-inch capillary tube and an external equalizer to provide the accurate pressure feedback required for systems running R-22 refrigerant (and is cross-compatible with R407C retrofits). Each kit comes complete with teflon seal rings and the necessary mounting hardware to ensure a leak-free installation on the line set.

• Precise Refrigerant Control: Optimizes evaporator efficiency across a broad 1.5 to 3 ton capacity range, improving overall system SEER.
• Compressor Protection: The external equalizer and sensing bulb prevent liquid refrigerant from exiting the evaporator, extending the life of the compressor.
• OEM Compatibility: Designed specifically as a drop-in replacement for Lennox part numbers 37J69 and LB-85759F.
• Durable Construction: High-grade brass body with a non-bleed seat to maintain system pressures during the off-cycle.

Is this TXV compatible with R410A systems?
No, the Lennox 56J19 is strictly calibrated for R22 or R407C pressures. Using this on an R410A system will lead to improper metering and potential system failure.

Does this valve require brazing?
This specific model utilizes Chatleff connections (threaded) and teflon seals, allowing for a mechanical connection to compatible Lennox coils without the need for an open flame near the cabinet.

Can I use this on a 1.5-ton or a 3-ton unit?
Yes, this is a multi-tonnage valve designed to modulate effectively for any indoor unit within the 1.5 to 3 ton range.

This item is not eligible for free shipping.

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.