Latest / HVAC School - For Techs, By Techs
Why a TXV instead of a TEV?.. or a CSV?
In this episode of HVAC School, Bryan talks to Leslie about the deceptive TXV.
Thermostatic expansion valves, also known as TXVs or TEVs, are metering devices that maintain superheat. They contain an external equalizer. External equalizers give the pressure reading that you would normally take with a suction gauge at the end of the evaporator coil. They supply the closing force to the TXV.
TXVs also contain a sensing bulb. The sensing bulb picks up the superheat on the suction line. When a vapor is superheated, its temperature exceeds its saturation temperature. The superheat value indicates…
The skinny
The skinny isn't ready yet — notes appear once the transcript is processed.