Armstrong Air® Thermal Expansion Valve Kit, For Use With: 2AC14B42P and 2AC14L60 Rooftop Unit, 3.5 - 5 ton, R-22, 1/4 Inch Flared, 17-1/2 Inch Capillary
The TXV is a refrigerant metering device that controls and regulates the amount delivered to the evaporator coil. Different from a piston or fixed orifice that doesn't modulate. Allows the system to operate at its highest efficiency.
