So as I promised, new unit for Symphy, 3 stage cascade (with some extras from me, like I stage autocascading).

Compressors - 15800btu, 10000btu, 10000btu
Condenser - brand new 1,9kW
Evap - chilly1 clone, made by Duniek.
Gases - R290/R23/R1150/R14/Argon
Safety devices - two cut-off devices (for low and high side) and one relief valve.
Heat exchangers - two "pipe in pipe" HX for autocascading stage and one plate HX for R1150/R14.
Extras - maybe SLHX, expansion tanks, manometers .

Expected temps...For sure about -50C loaded on I stage, that should give me nice second stage temps and finally third stage temps too, so if everything will go in good way we will see -150C -125C loaded would be great.




Plate HX






evap not cleaned yet, I had really hard job with that sleeve because of insulation, which is...32mm thick ! Really crazy, but I want to minimalize heat losses on suction line.




The most important - safety. Two cut-off devices with auto-reset and one relief valve. Wdrzal



Expansion tank, I`ve got one more in my cellar.



Brand new condenser with fan. (lol, like almost everything, only 15800btu rotary isn`t new).



Three hearts of the system.



Everything together.

I must finish that unit until 9 of march, so I have a lot to do ! Probably everyone who want see that unit in real, just can go to CeBIT and see it.

Wish me luck guys, I will need it !