Apeks Supercritical: Engineering subcritical and supercritical CO2 systems since 2001. Apeks Supercritical has been designing and manufacturing botanical oil extraction systems that utilize subcritical and/or supercritical CO2 as a solvent since 2001. Systems range in size from our smallest 1 liter benchtop system to our 40 liter production system and are fully automated for “lights out” operation. We are veteran owned, have several degreed engineers on staff and all of our systems are proudly built in Johnstown, Ohio with as many American made parts and components as possible. We have more than 300 systems being used in extraction applications across the US with more systems being added daily!