The Lennox 64W51 Expansion Valve (part number 100679-40) is a high-performance thermostatic expansion valve engineered for precision refrigerant flow control in R-410A HVAC systems. With a nominal operating pressure of 95 PSIG ±2 and a capacity rating of 8, this valve ensures optimal superheat regulation for efficient system operation and protection against compressor damage.This valve is designed to maintain stable evaporator performance even under varying load conditions, promoting improved energy efficiency and consistent cooling output. Built to meet OEM specifications, the 64W51 is ideal for Lennox residential or light commercial air conditioning and heat pump applications.Key Features:
- OEM Lennox expansion valve for R-410A systems
- Factory-calibrated to 95±2 PSIG
- Capacity rating: 8
- Ensures precise superheat control and efficient refrigerant metering
- Compatible with select Lennox HVAC models for guaranteed fit and performance
- Supports long-term system reliability and cooling efficiency
