Given that a great deal of water is present in oil at traditional oil recycling facilities, it is prudent to pre-treat these oils prior to vacuum treatment, which produces an ultra-low moisture level. It is not uncommon to have water-in-oil values more than 15% or even 25%. The Redragon CNF series addresses the issue of high water levels by integrating commercially available high-speed vertical disk-stack centrifuges into packaged systems that are available as skid-mounted or trailer-mounted units – self-powered by integral diesel generators if required.