Description
The Trane VAL8718 is a factory-engineered 4-ton thermostatic expansion valve (TXV) designed for use with R-410A refrigerant systems. Featuring 3/8″ sweat inlet and 1/2″ sweat outlet connections, this valve delivers precise, automatic refrigerant metering to maintain optimal evaporator superheat across a wide range of load conditions — protecting your compressor and maximizing system efficiency.
Built to Trane’s exacting OEM standards, the VAL8718 is the correct replacement or new-installation TXV for compatible 4-ton Trane and American Standard split-system air conditioners and heat pumps operating on R-410A. Its sweat (solder) connections ensure a leak-free, professional-grade installation that meets industry best practices.
Key Features
- Capacity: 4 tons
- Refrigerant: R-410A compatible
- Inlet connection: 3/8″ sweat (solder)
- Outlet connection: 1/2″ sweat (solder)
- OEM Trane replacement TXV — direct fit for compatible systems
- Automatic superheat regulation for consistent system performance
- Protects compressor from liquid slugging and overheating
Applications
- Trane and American Standard 4-ton split-system air conditioners
- Trane and American Standard 4-ton heat pump systems
- R-410A refrigerant systems requiring precise expansion control
Why Choose an OEM TXV?
Using a genuine Trane OEM thermostatic expansion valve ensures compatibility with your system’s design parameters, maintains manufacturer warranty compliance, and delivers the precise refrigerant flow control needed for peak efficiency and equipment longevity. The VAL8718 is engineered to match the exact superheat settings and flow characteristics of Trane’s 4-ton equipment lineup.
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