Does Nitrox generated using membrane separation or entrainment contaminate my Nitrox Ready cylinder?
Usually, but not at Fill Express. Most premix Nitrox produced using membrane separation or entrainment only meets what is known as the CGA Grade E quality verification level. Filling any cylinder with CGA Grade “E” quality Nitrox will introduce hydrocarbon contamination such that the cylinder is not considered O2 clean and may not later be used for partial-pressure blending. This is true even if the cylinder was previously Nitrox Ready. However, at each of our fill stations, just prior to our fill whips, we have a special final hyper-filter system which allows us to deliver our gases meeting the more stringent purity specification known as “Oxygen-Compatible”. Because of the hyper-filter, Fill Express premix Nitrox will not contaminate your cylinder.
