Trane VAL9481 TXV

The Trane VAL9481 is a high-capacity, heavy-duty 8 Ton HVAC TXV engineered for precise refrigerant metering in large-scale residential and light commercial R410A refrigerant systems. Featuring a 5/8 x 7/8 ODF sweat connection, this thermostatic expansion valve (TXV) maintains optimal superheat by modulating flow based on evaporator load, preventing liquid floodback and protecting the compressor. The valve is equipped with a 60-inch capillary tube and a sensing bulb for flexible mounting and fast thermal response on the suction line. Built with a durable brass body rated for 700 PSI maximum working pressure, the VAL9481 ensures consistent evaporator coil performance and peak energy efficiency under varying load conditions. For technicians performing a TXV replacement, this genuine OEM Trane expansion valve provides the exact flow characteristics and mechanical fit required to restore factory-spec cooling performance in high-tonnage air conditioning systems and heat pump units.

• Precise Superheat Control: This Trane VAL9481 TXV utilizes a sensitive thermal bulb to accurately meter R410A refrigerant, maximizing heat exchange efficiency and reducing energy consumption.
• High-Tonnage Compatibility: Designed for 8-ton cooling systems, handling high mass flow rates required for light commercial and large split-system applications.
• Enhanced Compressor Protection: Effectively prevents liquid refrigerant from entering the compressor, significantly reducing the risk of mechanical failure or "slugging."
• Contractor-Grade Durability: Features a robust brass seat and body tested to 700 PSI, ensuring structural integrity in high-pressure 410A HVAC units.
• Flexible Installation: The 60" capillary tube allows for convenient sensing bulb placement, ensuring accurate temperature readings even in tight air handler cabinets.

What are the symptoms of a failing Trane VAL9481 TXV?
Common indicators include an iced-over evaporator coil, erratic superheat readings, or the AC compressor running constantly without reaching the set temperature. If the valve is stuck closed, you will likely see high superheat and low suction pressure.

Does this valve require specific orientation during brazing?
Yes, ensure the arrow on the valve body points in the direction of refrigerant flow (toward the distributor). To prevent internal damage, always wrap the valve body in a wet rag or use a heat-sink gel when brazing the 5/8 x 7/8 sweat connections.

Is the VAL9481 compatible with R-22 systems?
No, this valve is strictly engineered for R410A systems. Using it with R-22 will result in incorrect metering and potential system damage due to incompatible pressure-temperature profiles.

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.