Carrier 331709-767 TXV Valve Kit

The Carrier 331709-767 TXV Valve Kit is an essential OEM thermostatic expansion valve designed for precision refrigerant metering in Carrier, Bryant, and Payne air conditioning and heat pump systems. This kit features a balanced port TXV design that compensates for varying load conditions, preventing liquid slugging and ensuring the evaporator coil maintains the correct superheat. Engineered for R-410A refrigerant systems, the 331709-767 ensures peak HVAC system efficiency by modulating flow based on real-time thermal demands. The bolt-on TXV replacement design simplifies field installation, allowing contractors to restore factory-spec cooling capacity without extensive piping modifications. As a direct Carrier replacement part, it guarantees the mechanical reliability required for high-duty cycle residential and light commercial applications. Utilizing a mechanical expansion valve like the 331709-767 is critical for maintaining SEER ratings and protecting the compressor from premature failure due to incorrect refrigerant levels.

• Precise Superheat Control: Maintains optimal evaporator performance across a wide range of ambient temperatures.
• OEM Compatibility: Exact Carrier 331709-767 specifications ensure a perfect fit for specific cased coil and air handler models.
• System Reliability: Prevents compressor damage by accurately managing refrigerant flow during low-load conditions.
• Simplified Service: Hard-piped or bolt-on configurations facilitate faster TXV installation during emergency repairs.
• Optimized Efficiency: Critical for achieving rated performance in high-efficiency HVAC systems using R-410A.

Is the Carrier 331709-767 compatible with R-22 systems?
No, this specific expansion valve kit is engineered strictly for R-410A pressure and temperature curves. Using it with R-22 will result in improper metering and potential system failure.

Does this TXV kit include the sensing bulb insulation?
Yes, standard Carrier TXV kits typically include the necessary mounting hardware and insulation tape to ensure the sensing bulb accurately reads suction line temperature without atmospheric interference.

What are the symptoms of a failing 331709-767 valve?
Common indicators include erratic suction pressures, evaporator icing, or hunting, where the valve fails to maintain a stable superheat, often caused by refrigerant oil contamination or a lost power head charge.

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.