Updating passive to active closed loop system and adding CRC

[Drohn]

Hi,

i recently aquired a passive closed loop system for bho extraction, works like a charm, even better i also got a 2nd System for free (price got lowered on amazon and seller couldn't be reached for shipping back).

But since dry ice is quite hard to get here and i can only work with ice + salts, i would like to convert it into an active closed loop system, to be able to run it in a loop and ease of recovery.

I was thinking about using a small electric piston pump for this, any idea which one to use, or better use a diaphragm one, or what specs to look out for?

Also i would like to add a CRC collum to the system, can i just pack silica/activated charcoal under the bud or do i really need to add an extra colum? Any experience on how it does on dewaxing, or do i really need to dewax with dry ice in the jacketed colum/winterisation?

 

[Drohn]

Also to add, I'm not looking to modify the system to a 300 psi system, but rather a hybrid system, keeping the collection vessel in a cold bath (salt/ice), and apply a pressure ~3 bars to the system to speed up the recovery rate.