nice rotary´s have you in cascade , how much BTU it have , cm/rev? r407c or R410a?

I have 2 rotary compr 9k btu on hi and low stage. Hi stage r22 low - r23. Low stage with captube - 0.8mm length 1.3mm = 350w heat load.And I change oil in comp's

not big rotary but still enough for haswell , charge first stage with R404A or R507 and the second with R1150(etylen) is the best solution, if the first compressor are designed for R22, change the oil with POE oil before charge with R404/R507

for haswell-e is also enough http://hwbot.org/submission/2703714_ 5400 is good for cascade.

yes, because the test is not so long , but if you change on the monster gpu can´t hold good load:)

i have in progress 2x cascade : small one with compressor 21k btu in first stage and in second 17k btu ..i designed for 400W load at -100 ( R507a and R1150)

and another monster cascade have in first stage one compressor 25k BTU and second stage 22k BTU that will be load king

http://forum.lab501.ro/showpost.php?p=401733&postcount=39

Wow, crazy cascade:))) for sailing?

i´m not salled because is for me done by me..so i put inside lot of work and soul , both are designed with universal mounting kit( gpu/cpu ) , evaporators are 42mm diam / 60mm tall , i use thermostatic expansion valve in first stage for R507A and in second stage cap tube 1,2mm because at those large capacity rotary´s. and ofcourse R1150 for best temps , i expected -125* will see

if you asking about my monster SS , that is , 28ccm rotary 16k BTU rotary:D

http://forum.lab501.ro/showthread.php?t=12896

No need Ln2 with such cascade. Good luck!

that is the point , i pay lot for LN2 , that i made those cascade:D

regards!

congratulates result