Auto-cascade assembled, currently pressure tested. Tommorow - if no leaks are to be found - I will vacuum the system using the standard triple-vacuum method and charge it with R-600/R-744 for the first time. I may need to charge a bit of R-507 to blend with the CO2 and help flushing dry ice.



Brazed shut port is the so-called wdrzal safety expansion port It will be used for HPCO.




Gas (CO2) line bypass with ball valve connected to expansion device: