Designed as a critical OEM replacement part

Power Efficiency: Advanced brushless DC motor technology minimizes transformer sizing requirements (3 VA)

Common Questions: What is the difference between a safety valve and a relief valve

Safety Compliance: Functions as a primary safety limit to protect the furnace from overheating due to static pressure issues

Automatic Reset: Self-correcting design restores system power without requiring a manual service call

Lennox 59W21 TXV Freon Designed as a critical OEMThe Lennox 59W21 Thermal Expansion Valve (TXV) is a critical 8 ton metering device engineered for precision refrigerant control in high capacity commercial HVAC systems. Designed with 3 8" x 1 2" ODF sweat connections, this valve ensures accurate superheat maintenance across varying load conditions, preventing liquid floodback and protecting the compressor. The 59W21 features a 30 inch capillary tube and is officially rated as the direct replacement