Expansion Valves & Orifice Tubes
Expansion valves and orifice tubes are essential refrigerant metering devices in mobile air conditioning systems. They control the flow of refrigerant into the evaporator, regulate system pressure, and play a direct role in cooling efficiency, temperature stability, and compressor protection.
Expansion valves—often referred to as thermostatic expansion valves (TXVs)—adjust refrigerant flow based on temperature and pressure feedback. This allows the system to respond to changing operating conditions while maintaining consistent evaporator performance. TXVs are commonly used in heavy-duty trucks, off-highway equipment, agricultural machinery, and custom mobile HVAC systems.
Orifice tubes are fixed-metering devices that control refrigerant flow through a calibrated opening. They offer a simple, durable solution and are widely used in OEM and fleet truck applications. Because orifice tubes can trap debris, replacement is recommended during compressor failure or system service.
BTRAC offers a wide selection of heavy-duty expansion valves and orifice tubes designed for mobile HVAC environments where vibration, heat, and continuous operation are common. Our inventory supports R-134a systems and OEM-style fitment for trucks, construction equipment, and industrial applications.
