Some non bleed applicatins will use the TXV as a solenoid because it will provide 100% shut off and in place of using a large solenoid, You can use a small one on the externally equalizer line to act as a pilot duty solenoid and slam the valve shut.
A non-bleed valve will do as the others say; i.e. not allow system equalization to prevent floodback to the compressor upon system startup.
It is also thought that a system that does not equalize after shutdown will spend less time coming back into its nominal operating parameters after it restarts. IOW the compressor isn't spending a lot of time pulling the evap back down to design saturated vapor temp/pressure since the pressure in the evap at startup is more or less already there.
Non-bleed TXV's will require a start cap and potential relay on a single phase compressor.
Electricity makes refrigeration happen.
Refrigeration makes the HVAC psychrometric process happen.
HVAC pyschrometrics is what makes indoor human comfort happen...IF the ducts AND the building envelope cooperate.
A building is NOT beautiful unless it is also comfortable.