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Cap Tubes and Flow Facts - Short #171
In this short podcast, Bryan goes over some information about cap tubes (capillary tubes) and flow facts.
Cap tubes are metering devices; they're long tubes with small diameters, and their flow rates are dictated by the tubing diameter size and tube length. Pistons and TXVs are some of the most common metering devices in residential HVAC, and flow restriction doesn't just happen at the metering device; distributors also contribute to the pressure drop and act like small capillary tubes in addition to the metering device. Older units, simple refrigerators, and window units are more likely to…
The skinny
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