Choosing a nitrogen membrane separator comes down to pressure, physical size, and whether the rest of your gas system is already assembled. When you are looking at a used membrane that once fed a draught beer line, the central question is whether it can step into your filtration separation setup without turning into a full rebuild.
Quick verdict
The Green Air Nitrogen Membrane Separator is a used membrane listed at USD 1,500.00. It previously produced nitrogen for a high-demand draught beer system before the location closed. If your process already has the surrounding gas-handling equipment, this membrane covers the separation core. If you are building a nitrogen system from nothing, budget for the fact that the separator is one piece of a larger gas train.
Who it suits
This separator is labeled for medical, industrial, processors, and beverage use, so it spans beverage dispensing, food and drink processing, and industrial gas work. The strongest fit is a buyer who already has the rest of the supply chain in place and needs the membrane separator to complete the chain. Since this is a used unit, any purity-sensitive application should be measured against your own standards rather than the category names on the label.
What stands out from the listed details
The first thing that stands out is the physical scale. This membrane is 45 inches long, 6-8 inches wide, and weighs roughly 30 lbs, so you are handling a substantial component rather than a small cartridge. The 200 PSI rating defines the pressure ceiling for the feed side. The previous duty in a high-demand draught beer system points to continuous beverage gas service rather than intermittent lab work.
Meaningful trade-offs
The main trade-off is that the compressor and tanks that were attached to it are not part of this purchase. That shifts the planning work to you: the membrane is the centerpiece, but the rest of the nitrogen supply path needs to come from your side. The used condition also warrants a careful look at overall fit with your existing equipment.
Bottom line
If you need nitrogen separation for a draught beer system or an industrial gas process and you already have the rest of the system in place, the Green Air Nitrogen Membrane Separator at USD 1,500.00 is a direct way to close that gap. It is not a complete turnkey generator. It is a substantial used membrane that has performed in a production beverage environment, ready to be paired with the right gas-handling equipment.
Nitrogen Membrane Separator Medical/Industrial/Processors/Beverage
This used Green Air membrane brings a 200 PSI rating and a 45-inch body to a beverage or industrial nitrogen setup, making it a practical fit when your existing compressor and tanks are ready for a separation core. The limitation is that the compressor and tanks from its original installation are not included, so the membrane alone will not deliver finished nitrogen.
