Description
The Trane VAL9478 Thermal Expansion Valve (TXV) is a genuine OEM HVAC component designed to regulate refrigerant flow in air conditioning and heat pump systems using R 410A refrigerant. This thermostatic expansion valve plays a critical role in optimizing cooling performance, improving energy efficiency, and preventing evaporator coil flooding in 4 ton Trane systems and compatible units.
Key Features
- Precise Refrigerant Regulation: Automatically adjusts refrigerant flow based on temperature and pressure changes to maximize heat exchange and cooling efficiency.
- Rated for 4 Ton Systems: Engineered to support up to 4 tons of cooling capacity, making it ideal for mid range residential and light commercial HVAC applications.
- 3/8″ × 1/2″ Connection Sizes: Standard inlet/outlet dimensions simplify installation and ensure compatibility with OEM equipment.
- Brass Construction: Durable material resists corrosion and withstands typical HVAC system pressures up to approximately 700 PSI.
- Included Capillary Tube: Comes with a 5 foot capillary for precise thermal sensing and effective system performance control.






