Capillary tubes are generally used as the metering device on small, fractional-horsepower refrigeration systems. Charging these systems with refrigerant requires a different procedure than those ...

The capillary tube has been used as a refrigerant metering device for many decades. Many HVACR manufacturers are still successfully employing capillary tube metering devices in their latest equipment.

Capillary tubes serve as simple, fixed-geometry throttling devices in vapour compression refrigeration systems, creating a controlled pressure drop that drives refrigerant expansion from the condenser ...