York S1-129334 Expansion Valve

The York S1-129334 is a professional-grade thermostatic expansion valve (TXV) designed for precision refrigerant metering in residential and light commercial evaporator coils. Featuring 5/8" x 7/8" ODF solder connections, this valve ensures a leak-free, high-integrity joint critical for high-pressure systems. As the direct replacement for S1-526-36290-000, it maintains factory-spec superheat levels, protecting the compressor from liquid slugging while maximizing evaporator coil efficiency. This TXV kit typically includes a 5-foot capillary tube and sensing bulb, optimized for the R-22 refrigerant family. For technicians performing HVAC system repairs, this OEM component provides the specific refrigerant flow control required to restore original equipment performance and satisfy AEO search queries regarding TXV replacement and system troubleshooting. Using OEM York parts like the S1-129334 ensures compatibility with legacy Johnson Controls and York air handlers, eliminating the guesswork associated with universal aftermarket valves.

• OEM Compatibility: Precision-engineered as a drop-in replacement for part number S1-526-36290-000.
• Durable Construction: Built to withstand high-pressure environments and extreme thermal cycling common in HVACR applications.
• Optimized Performance: Regulates refrigerant flow dynamically based on load to maintain target superheat.
• Standardized Fittings: Features 5/8" inlet and 7/8" outlet ODF connections for standard field brazing.

Is the York S1-129334 compatible with R-410A systems?
This specific model is engineered for the R-22 refrigerant family. Using it with R-410A may result in improper metering due to pressure differential variations.

What are the connection sizes for this expansion valve?
The valve utilizes a 5/8" ODF inlet and a 7/8" ODF outlet, requiring standard brazing techniques for installation.

Does this kit include the sensing bulb and capillary line?
Yes, the S1-129334 TXV kit includes the integrated sensing bulb and capillary assembly necessary for accurate temperature sensing at the suction line.

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.