York S1-1TVM4G1 Expansion Valve

The York S1-1TVM4G1 is a mission-critical 3 Ton R410A TXV engineered for precise refrigerant metering in York, Luxaire, and Coleman air handlers. Built with a 5/8" x 5/8" ODF connection, this thermostatic expansion valve provides the accurate superheat control necessary to maximize evaporator efficiency and protect the compressor from liquid slugging. The 30-inch capillary lead allows for flexible sensing bulb placement, ensuring the valve responds rapidly to load changes in 36,000 BTU systems. This refrigerant metering device is a direct OEM replacement part, designed to handle the high operating pressures of R410A without the performance drift common in universal aftermarket components. For technicians performing a system restoration or coil swap, this valve maintains the factory-specified subcooling levels required for peak SEER ratings. The robust stainless steel power element and high-grade internal needle assembly ensure reliable modulation under heavy thermal cycles.

Key Benefits

• Precision-calibrated for 3 Ton R410A systems to maintain optimal evaporator heat transfer.
• Features standard 5/8" sweat inlet and outlet connections for seamless field brazing.
• Includes a 30" capillary tube for versatile remote bulb mounting on the suction line.
• OEM-spec construction prevents common issues like hunting or erratic superheat levels.
• Hard-shutoff design improves system performance during off-cycles in modern HVACR equipment.

Common Questions

How do I replace a York 3-ton expansion valve? Replacement requires recovering the refrigerant and desoldering the 5/8" connections. It is vital to wrap the valve body with a wet rag during brazing and to mount the sensing bulb at the 10 or 2 o'clock position on the suction line for accurate feedback.

Where can I find York S1-1TVM4G1 technical specifications? This valve is rated for 3 tons of cooling capacity, specifically for R410A refrigerant, and features 5/8" ODF connections and a 30" capillary lead for York-specific coil configurations.

Is the York S1-1TVM4G1 compatible with R410A? Yes, this valve is factory-set and calibrated exclusively for R410A refrigerant pressures and should not be used in R22 or legacy systems.

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.