Description
The Trane VAL21108 is a factory-engineered thermostatic expansion valve (TXV) designed specifically for use with R454B refrigerant in 3-ton HVAC applications. Built to Trane’s exacting OEM standards, this valve delivers precise refrigerant metering to maintain optimal evaporator performance, system efficiency, and long-term equipment reliability.
Key Features
- Designed for R454B low-GWP refrigerant — compatible with modern, environmentally responsible HVAC systems
- 3-ton capacity rating — matched for residential and light commercial cooling applications
- Chatleff (flare-type) fitting connection — provides a secure, leak-resistant service port interface
- 80 PSI pressure rating — engineered for safe, stable operation within system design parameters
- OEM Trane replacement part — ensures drop-in compatibility and maintains original equipment performance
- Precision thermostatic control — regulates refrigerant flow to maintain proper superheat at the evaporator
Why Use a TXV?
A thermostatic expansion valve is a critical metering device in the refrigeration circuit. It automatically adjusts refrigerant flow in response to evaporator load changes, preventing both flooding and starving of the evaporator coil. Using the correct OEM-specified TXV — like the Trane VAL21108 — ensures your system operates at peak efficiency, protects the compressor, and extends overall system life.
Application
- Refrigerant: R454B
- Capacity: 3 Ton
- Connection: Chatleff fitting
- Pressure Rating: 80 PSI
- Replacement for Trane OEM systems utilizing R454B refrigerant
Why Buy from Jackson?
Jackson Systems stocks genuine Trane OEM components to keep your equipment running as designed. Order the Trane VAL21108 with confidence — backed by knowledgeable HVAC support and fast fulfillment.







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