Lennox 13Y21 TXV Valve

The Lennox 13Y21 is a high-performance 5 Ton R410A TXV engineered specifically for outdoor condensing units. As a veteran-grade thermal expansion valve, this OEM component provides critical refrigerant metering for 5-ton split systems, ensuring the evaporator coil remains optimally flooded across varying load conditions. It features a robust TR6 valve body designed to handle a maximum working pressure of up to 660 PSIG, making it a reliable choice for Lennox commercial HVAC parts and residential replacements alike.

This outdoor expansion valve utilizes a balanced port design to maintain precise superheat control between 15°F and 60°F, even during rapid ambient temperature shifts. The Lennox 13Y21 TXV Valve includes 3/4-inch threaded inlet/outlet connections for secure, leak-free integration. Techs should note the fixed orifice configuration and external equalization, which are vital for maintaining system efficiency and preventing liquid slugging in the compressor. This kit typically includes the necessary washers and bulb clamps to streamline the HVAC expansion valve replacement process in the field.

• OEM Compatibility: Precision-fit for Lennox, Armstrong, and Ducane 5-ton R410A outdoor units.
• Superior Metering: Maintains consistent superheat to protect the compressor and maximize SEER ratings.
• High Pressure Durability: Rated for 660 PSIG to handle the demands of modern R410A high-side pressures.
• Professional Grade: All-brass construction with threaded connections facilitates a cleaner install compared to sweat-only valves.

• How can I tell if my current TXV is failing? Symptoms often mirror a low refrigerant charge, such as high superheat and low suction pressure, but with normal or high subcooling. Always check for a restricted sensing bulb or a stuck internal needle before replacing.
• Does this valve require a specific orientation? Yes, ensure the Lennox 13Y21 is mounted in the correct flow direction as indicated on the valve body and that the sensing bulb is securely insulated at the 10 or 2 o'clock position on the suction line.
• Is this compatible with R22 systems? No, this valve is strictly calibrated for R410A refrigerant and should not be used in legacy R22 equipment.

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.