The GNR family lists an SF6 gas purification system alongside recovery and refill devices. Purification is the filter and adsorption step: moisture, decomposition products and particles.
We do not reprint another vendor’s ppm table and call it GNR data. The original sf6recovery.cc product page did not publish a purity guarantee. If a project needs a written moisture or purity limit, that limit has to come from the quotation, not from this paragraph.
What can be said from the published positioning: oil-free compression plus filtration is the intended path for reuse, and GNR treats that path as a package rather than a spare filter cartridge.
