Description
Trane VAL8704 Expansion Valve Overview
The Trane VAL8704 is a factory-specified expansion valve engineered for 6-ton HVAC applications. Designed to deliver precise refrigerant metering, this valve maintains optimal evaporator performance by regulating refrigerant flow in response to system load demands. Its OEM-grade construction ensures a direct-fit replacement that upholds the performance standards Trane equipment is built around.
Key Features
- 6-ton capacity for commercial and residential HVAC systems
- 3/8″ inlet connection for proper line compatibility
- 1/2″ outlet connection for accurate downstream flow delivery
- Engineered for precise refrigerant metering and evaporator superheat control
- OEM Trane replacement part — direct-fit design for compatible Trane systems
- Durable construction for long-term, reliable operation in demanding HVAC environments
Product Specifications
- Brand: Trane
- Part Number: VAL8704
- Valve Type: Expansion Valve (EXV)
- Capacity: 6 Ton
- Inlet Size: 3/8″
- Outlet Size: 1/2″
Application
The Trane VAL8704 expansion valve is ideal for use in Trane split systems, packaged units, and other compatible HVAC equipment requiring a 6-ton expansion valve. Proper refrigerant flow control is critical to system efficiency and equipment longevity — replacing a worn or failed expansion valve with this OEM Trane part helps restore full system capacity and efficiency.







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