Expansion Valves and Orifice Tubes

All Pro Truck Parts carries expansion valves and orifice tubes for heavy-duty truck air conditioning systems. These metering devices control refrigerant flow into the evaporator — expansion valves (TXVs) are used on valve-controlled systems, orifice tubes on fixed-orifice systems. A stuck valve or clogged orifice tube causes poor cooling, evaporator icing, or no cold air at all. We stock both types for the most common Class 6 through Class 8 truck platforms.

Visit our help center if you need help finding the correct metering device for your truck's AC system.