Though we'd like to believe grape stomping is still the main grape-crushing method, this has been replaced by a partnership between air compressors, the grape crusher, and a bladder. Our oil-free rotary screw compressors are designed to have the lowest lifecycle cost and deliver the highest quality air for industry standards. ISO 8573-1 class, you are sure to be working with zero risk of contamination, unsafe products, or losses from operational downtime.

 https://www.atlascopco.com/en-us/compressors/industry-solutions/wine-solutions