York S1-151258 Expansion Valve

The York S1-151258 Expansion Valve is a precision-engineered thermostatic expansion valve (TXV) designed for high-performance refrigerant metering in York, Johnson Controls, and Luxe systems. Featuring a 30-inch capillary tube and 1/2" x 1/2" ODF sweat connections, this OEM replacement valve ensures accurate superheat control across varying load conditions. Specifically designed to prevent liquid slugging and evaporator freeze-ups, the S1-151258 thermostatic expansion valve modulates refrigerant flow to maximize heat transfer efficiency in residential and light commercial air handlers and heat pumps. Unlike generic alternatives, this York HVAC expansion valve incorporates a balanced port design to maintain stable suction pressures, making it a critical component for technicians performing a York TXV replacement on systems utilizing R-410A refrigerant. The durable brass body and robust sensing bulb assembly are built to withstand the rigorous demands of professional HVACR environments, ensuring long-term system reliability without the risk of common aftermarket failures.

• Precise Superheat Regulation: Maintains optimal refrigerant levels in the evaporator to protect the compressor from liquid floodback.
• Universal Solder Connections: The 1/2" x 1/2" ODF (Open Drive Female/Sweat) ports allow for a secure, leak-free installation on standard liquid lines.
• OEM Compatibility: Guaranteed fit for specific York and JCI units, eliminating the need for field modifications or bracket adjustments.
• Enhanced System Efficiency: Dynamically adjusts to cooling demand, reducing energy consumption and operational wear on the system.
• Extended Capillary Reach: The 30-inch sensing lead provides versatility for bulb placement on suction headers of various configurations.

Is the York S1-151258 compatible with R-410A systems?
Yes, this valve is engineered to handle the higher pressures of R-410A refrigerant, making it suitable for modern high-efficiency cooling and heat pump applications.

What are the symptoms of a failing S1-151258 TXV?
Contractors often identify failure through high superheat at the evaporator, frost on the expansion valve body, or low suction pressure accompanied by high head pressure, indicating a restricted or "stuck closed" valve.

Do I need to wrap the valve during brazing?
Yes. To protect the internal diaphragms and gaskets, always use a wet rag or heat-sink paste on the 1/2" ODF connections during the soldering process.

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.