Trane VAL7991 TXV 319848-301 and operational mode symbols

and operational mode symbols

providing the necessary phase shift for both the compressor (35 microfarad) and the condenser fan motor (5 microfarad)

maintaining a proper seal at the chamber face is non-negotiable for system efficiency and safety

alternative adapters or linkages would be required to ensure proper mechanical engagement

Trane VAL7991 TXV 319848-301 and operational mode symbolsThe Trane VAL7991 TXV is a high precision thermostatic expansion valve engineered for 1. 5 ton HVAC systems. Designed for professional refrigerant flow control, this valve features 5 16 inch ODF x 5 8 inch ODF connections and includes a 36 inch capillary tube to ensure accurate superheat monitoring at the evaporator outlet. As a critical component in maintaining system efficiency, the Trane VAL07991 (the updated OEM part number) modulates refrigerant