York S1-025-43225-000 Expansion Valve

The York S1-025-43225-000 Expansion Valve is a precision-engineered 4 Ton TXV designed specifically for R410A refrigerant systems. This OEM thermostatic expansion valve features 3/8 x 3/8 ODF connections and a 31-inch capillary tube, ensuring accurate superheat control across varying load conditions. As a critical metering device, it manages the flow of liquid refrigerant into the evaporator coil, preventing liquid slugging and protecting the compressor from damage.

For service technicians, this York HVAC replacement part is the standard for maintaining system efficiency in 4-ton cooling units. Its robust internal diaphragm and stainless steel power element are built for high-pressure R410A environments, providing reactive modulation to prevent coil freeze-up. When diagnosing low cooling performance or improper superheat readings, replacing a restricted valve with this genuine York S1-025-43225-000 ensures the system returns to its original factory-specified operating parameters without the reliability issues associated with universal aftermarket alternatives.

• Precise Refrigerant Metering: Delivers exact liquid flow to the evaporator to maximize heat transfer efficiency in 4-ton R410A systems.
• Optimized Superheat Control: Features a sensitive 31" capillary and bulb assembly to maintain stable suction temperatures and prevent compressor flooding.
• OEM Compatibility: Designed as a direct drop-in for York, Luxaire, and Coleman units, utilizing standard 3/8 x 3/8 sweat connections for reliable brazing.
• System Protection: Acts as the primary line of defense against evaporator coil icing and excessive discharge temperatures.

Is the S1-025-43225-000 compatible with older R22 systems?
No, this specific thermostatic expansion valve is calibrated strictly for R410A refrigerant pressures and flow rates. Using it with R22 will result in improper metering and potential system failure.

What are the connection sizes for this York TXV?
This valve uses 3/8" x 3/8" ODF (Over Delaware Fitting) sweat connections, making it compatible with standard 3/8" copper liquid lines found on most 4-ton residential and light commercial evaporators.

Does this kit include the sensing bulb mounting hardware?
Yes, the York S1-025-43225-000 typically includes the necessary clamps to ensure the sensing bulb has proper thermal contact with the suction line for accurate temperature readings.

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.