York S1-1TVM4F1 Expansion Valve

The York S1-1TVM4F1 Expansion Valve is a critical metering device engineered for high-pressure R410A refrigerant applications. This 2-ton TXV utilizes 5/8" x 5/8" sweat connections, providing a robust interface for standard residential and light commercial evaporator coils. The inclusion of a 30-inch capillary tube allows for flexible external sensing bulb placement, ensuring accurate superheat measurement even in tight cabinet configurations. As a genuine York OEM replacement part, this valve is calibrated to respond quickly to evaporator load changes, preventing liquid floodback and maintaining compressor reliability. Field professionals recognize this component for its consistent orifice performance and durable diaphragm assembly, which are essential for restoring system SEER ratings. When replacing a restricted or failing valve, ensure proper nitrogen purge during the brazing process to protect the internal needle and seat from oxidation. This valve is a direct fit for compatible York, Luxaire, and Coleman air handlers requiring precise thermal regulation.

Key Benefits

• Precise superheat regulation to optimize evaporator coil heat transfer.
• Designed specifically for the thermal characteristics of R410A systems.
• Durable 5/8" ODF connections ensure leak-free integration with copper line sets.
• Extended 30" capillary line facilitates easier mounting of the sensing bulb on the suction line.
• Genuine OEM construction ensures specified flow rates and port sizing.

Common Questions

Is the York S1-1TVM4F1 compatible with R22?
No, this thermal expansion valve is internally compensated and calibrated specifically for the pressure-temperature relationship of R410A. Using it with other refrigerants will result in improper metering and potential compressor damage.

What tonnage system is this valve rated for?
This is a 2-ton TXV. Installing a valve with an incorrect tonnage rating can lead to evaporator starving or hunting, which reduces overall system efficiency.

Does this assembly include the sensing bulb?
Yes, the York S1-1TVM4F1 includes the integrated sensing bulb at the end of the 30-inch capillary tube for external mounting on the suction header.

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.