York S1-025-38739-042 TXV

The York S1-025-38739-042 TXV is a precision-engineered thermal expansion valve designed for veteran HVAC technicians managing R410A refrigerant systems. This 2-ton TXV facilitates stable superheat control, which is critical for preventing liquid floodback and protecting the compressor from premature failure. Featuring standard 3/8" x 3/8" connections, it offers a direct-fit replacement for residential and light commercial air conditioning units. The integrated 30-inch capillary tube and sensing bulb deliver responsive refrigerant metering, ensuring the evaporator stays fully active across varying load conditions. Rated for 98 PSIG, this component maintains system equilibrium and optimizes the thermal efficiency of the cooling coil. For service contractors, using this HVAC replacement part ensures the unit meets its original performance specifications while maintaining critical subcooling and superheat balance in high-pressure 410A applications.

• Optimal Refrigerant Control: Precisely regulates the flow rate into the evaporator to maintain the correct temperature-pressure relationship.
• Compressor Protection: Actively prevents liquid refrigerant from exiting the evaporator, reducing the risk of slugging.
• Standardized Fit: The 3/8" x 3/8" inlet and outlet sizes allow for rapid integration into existing liquid lines.
• High-Pressure Durability: Specifically engineered to handle the higher operating pressures associated with modern R410A systems.
• Extended Reach: Includes a 30-inch capillary for versatile bulb placement on suction lines.

Is the York S1-025-38739-042 compatible with older R-22 systems?
No, this valve is fixed for R410A refrigerant pressures and will not provide accurate metering or capacity control in R-22 circuits.

Do I need to replace the sensing bulb insulation?
Yes, for the 30" capillary tube and bulb to accurately sense suction line temperature, proper insulation is required to prevent ambient air from affecting the valve's opening force.

Does this valve require an external equalizer?
This specific York TXV model is typically internally equalized or matched to specific coil configurations; always verify the evaporator header layout before brazing.

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.