Trane VAL20518 Expansion Valve 30067439-890 terminals 1 and 3 are

terminals 1 and 3 are for the 24V coil

Integrated Flame Sensing: Features a dual-purpose design with a built-in flame rod for accurate millivolt signal feedback to the ignition module

slop-free connection to the faucet stem

including units from York

ensuring long-term reliability even in areas exposed to environmental stressors

Trane VAL20518 Expansion Valve 30067439-890 terminals 1 and 3 areThe Trane VAL20518 Expansion Valve is a genuine OEM 3 ton thermostatic expansion valve (TXV) specifically engineered for residential and light commercial HVAC systems utilizing R22 refrigerant. As a critical component in the refrigeration cycle, this valve regulates the flow of refrigerant into the evaporator coil based on heat load, maintaining precise superheat control. For technicians replacing failing metering devices, the VAL20518 is the direct