Lennox 26K35 Expansion Valve

The Lennox 26K35 is a high-performance HVAC thermal expansion valve specifically engineered for R22 refrigerant systems with a capacity range of 3.5 to 5 tons. This OEM TXV kit (catalog number 26K35, identical to 26K3501) provides critical refrigerant metering to maintain precise superheat at the evaporator outlet, maximizing cooling cycles and protecting the compressor from liquid slugging. Built with durable brass construction and featuring a 17.5-inch capillary tube, this valve is a direct replacement for Lennox evaporator coils including the C24, CH24, and CR24 series. It functions by monitoring system pressure and temperature via its sensing bulb, ensuring consistent indoor unit performance even during high-load conditions. For contractors performing R22 to R407C retrofits or standard service repairs, this replacement expansion valve offers the exact drop-in fitment required to restore factory-specified subcooling and efficiency levels across Armstrong, Ducane, and Lennox air conditioning platforms.

• System Compatibility: Serves as a direct OEM replacement for Lennox 26K3501 and LB-85663K, fitting wide-tonnage C24 and CH33 systems.
• Precise Metering: Accurately modulates R22 refrigerant flow to provide stable superheat control and improved energy efficiency.
• Rugged Reliability: Engineered by Parker for Lennox with a robust design that resists internal debris and ensures leak-free operation.
• Complete Installation Kit: Includes necessary mounting hardware, Teflon rings, and a brass sensing bulb strap for a secure mechanical bond.

• Is the Lennox 26K35 compatible with R410A systems? No, this expansion valve is specifically calibrated for the pressure-temperature characteristics of R22 and R407C refrigerants only.
• Can I use this 26K35 valve on a 3-ton unit? This valve is rated for 3.5 to 5-ton capacity; using it on lower tonnage systems may result in unstable "hunting" and poor evaporator performance.
• Does this kit include the sensing bulb insulation? Most kits include the hardware and valve; technicians should ensure the sensing bulb is properly insulated after mounting to the suction line for accurate readings.

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.