Hey there, if you’ve ever worked with industrial equipment at high altitudes—say, running a food processing plant in the Rockies, a wastewater treatment facility in the Andes, or even a remote mining camp in the Himalayas—you’ve probably run into a weird question: can a nitrogen generator even work up here? As a nitrogen generator supplier, I get this question at least once a week, and it’s way more nuanced than just a simple “yes” or “no.” Let’s break this down like we’re chatting over a coffee, not reading a 50-page spec sheet. Nitrogen Generator
First, let’s level set on what high altitude actually means for anyone who’s ever struggled with a headache after a short flight. At sea level, atmospheric pressure is 14.7 psi, and air is ~78% nitrogen, 21% oxygen, and 1% other stuff. Crank that altitude up to 10,000 feet (common for mountain towns), and atmospheric pressure drops to ~10.2 psi. That’s a 30% pressure drop, and every component of air scales with that—so there’s 30% less oxygen, nitrogen, and everything else in the same volume of air.
Now, how do most nitrogen generators work? The two big types are membrane systems and pressure swing adsorption (PSA) systems. Let’s start with PSA because that’s the workhorse for most industrial needs. PSA uses canisters filled with carbon molecular sieve (CMS)—tiny, porous beads that trap oxygen faster than nitrogen. You pressurize ambient air, shove it through the CMS, oxygen sticks, and pure nitrogen comes out the other end. For PSA, pressure is everything at its core. At sea level, we pressurize the incoming air from ~14.7 psi to 100–150 psi (that’s the standard feed pressure) to get the CMS to work right.
At high altitude, that feed pressure is lower to start with. If you’re at 10,000 feet, your incoming air is only at 10.2 psi, so even if you run your compressor at the same power, you can only get it up to, say, 95 psi instead of 150. That lower differential pressure across the CMS canister means less oxygen gets trapped. So what happens? The purity of your nitrogen drops. Most standard PSA generators we sell are designed for sea level, so at 10,000 feet, you might go from 99.9% pure nitrogen (which is standard for things like blanketing fuel tanks, food packaging, or laser cutting) down to 99.5%. For a lot of applications, that’s still totally fine—99.5% is the same as the nitrogen we breathe, after all. But if you need 99.999% pure nitrogen for something like lab equipment or semiconductor manufacturing, a standard generator won’t cut it at high altitude.
What about membrane systems? These use hollow fiber membranes that separate nitrogen from oxygen based on molecular size. Like PSA, membrane systems rely on pressure to push air through the fibers, so they have the same high-altitude quirk. Membrane generators usually specify feed pressure at 100 psi too, so at 10,000 feet, you’ll see a similar purity drop—maybe from 99% at sea level to 98% up high. Again, that’s not a problem for lots of use cases, but it’s something to account for.
Wait, but this isn’t a dealbreaker, right? Our team doesn’t just sell one-size-fits-all generators—we’ve tweaked models for high-altitude sites for years. The fix is simpler than you might think: adjust the PSA’s pressure differential or swap out a few internal parts to work with lower inlet pressure. For example, we can tweak the CMS bed size to compensate for the lower volume of nitrogen in incoming air, or upgrade the compressor to give a higher discharge pressure. A lot of suppliers will tell you “no, it can’t work” because they only make generic models for sea level, but we design for variable conditions. We even did a project a couple years back with a craft brewery in Breckenridge, CO—they needed nitrogen to push their stout kegs, but their altitude was 9,600 feet. We customized a small membrane generator for them, and it’s been running flawlessly for 4 years now. No more hauling heavy nitrogen cylinders up the mountain every month, which saved them a ton on delivery costs.
That’s another big point: cylinders are way worse at high altitude. Think about it—if you’re at 10,000 feet, a full nitrogen cylinder is pressurized, but the “net” pressure difference between the cylinder and the surrounding air is lower. So you can only get ~15–20% less gas out of the cylinder than you would at sea level. Plus, delivery to remote high-altitude sites is a nightmare—trucks can’t get up some roads in winter, and shipping cylinders is way more expensive than running a generator that taps into the air around you. That’s why so many of our customers at high altitude switch to generators: it’s cheaper, more reliable, and you don’t have to deal with running out of gas in the middle of a shift.
But wait, are there any pitfalls you have to watch out for? Absolutely. Let’s talk about humidity first. High altitude often means drier air, but not always—some places like the Pacific Northwest have high altitude and super rainy, so humidity is still an issue. Both PSA and membrane systems have filters to remove moisture and particulate from incoming air. At high altitude, the compressor has to work a little harder to pull in enough air, so you might need to change those filters a bit more often. It’s a small tweak, but something to keep on your maintenance checklist.
Another thing: altitude effects on nitrogen use. Wait, no—nitrogen’s properties don’t change with altitude, right? It’s still inert, same density at the same pressure, so if you’re using nitrogen for blanketing a tank, the amount you need to use doesn’t change. The only variable is how much you’re producing, which we’ve already accounted for with our custom tweaks.
And what about extreme high altitude, like 15,000 feet (common in the Andes or Himalayan mining camps)? That’s where it gets trickier, but not impossible. At 15,000 feet, atmospheric pressure is only ~8.7 psi, so you’re looking at a 40% pressure drop from sea level. For PSA generators, we have to adjust the CMS cycle times too—since the feed air is thinner, we can’t hold pressure as long in the canisters. We worked with a mining company in Peru a couple years back at 14,800 feet, designed a PSA generator with a larger compressor and a slightly modified CMS bed, and they’re using it for inert gas blanketing on their underground ore tanks. It’s been running for 3 years, no issues. The key here is that off-the-shelf generators won’t work, but custom ones from a supplier who actually understands high-altitude conditions will.
Let me also bust a myth here: some people think “if altitude is higher, nitrogen is less, so the generator won’t make enough.” That’s half right, but again, we adjust for that. If a standard generator makes 100 cfh of nitrogen at sea level, at 10,000 feet it’ll make ~70 cfh unless we tweak it. So if you need 100 cfh at high altitude, you just size the generator a bit bigger upfront. It’s that simple. No magic, just math and adjusting the equipment to your specific site.
I should also mention how we test these before we ship. We don’t just plug a generator into a sea level line and send it on its way. We have a test lab that can simulate altitude pressure, so we can run all our custom models at 5,000, 10,000, 15,000 feet—whatever you need—before it leaves our facility. That way, when it gets to your site, you don’t have to do any guesswork; it’ll run exactly as it should.
Wait, let’s circle back to that brewery in Breckenridge I mentioned earlier. They were using cylinders before, and every time winter hit, the roads to their location would ice over, so sometimes they’d go 3 or 4 days without nitrogen, which meant they couldn’t keg their beer. That cost them thousands in lost sales. The generator we installed cost them a bit upfront, but they calculated it paid for itself in 18 months from eliminating cylinder delivery costs and lost downtime. That’s the kind of ROI that makes a generator worth it, even at high altitude.
Another common use case: food processing at high altitude. A lot of snack companies dry their products in mountain facilities, and they use nitrogen to package chips and nuts to keep them fresh without preservatives. We have a client in Denver that packages frozen pizza crusts, and they run a PSA generator at 5,280 feet (that’s mile high, obviously). It’s a standard model, not even custom, because the altitude is low enough that the purity drop is negligible for their needs. They’ve been using it for 6 years now, no issues. So even mile high is totally doable with the right generator.
What about things to avoid? Don’t buy a cheap, off-brand generator from Amazon or a random industrial supply store if you’re at high altitude. Those are designed for sea level, and they’ll underperform, maybe even break in a year or two. Stick with a supplier that has experience modifying generators for high-altitude sites, like us. We’ve been doing this for over a decade, and we’ve worked with sites at every altitude from 5,000 to 16,000 feet, so we know the ins and outs.
So to answer the original question: yes, a nitrogen generator can be used at high altitude, but it’s not a “set it and forget it” situation for standard off-the-shelf models. The key is working with a supplier who understands how altitude affects the pressure and purity of nitrogen output, and can customize the generator (even if it’s just a small adjustment to the compressor or filter size) to fit your site.
If you’re at a high-altitude site and tired of hauling heavy nitrogen cylinders, or your current generator isn’t performing like it should, we can help. Just reach out, tell us your altitude, how much nitrogen you need (cfh or liters per minute), and what you’re using it for, and we’ll put together a custom solution that works for you. No guesswork, no one-size-fits-all garbage—just equipment built for your specific location and needs.
Oxygen Generator References
- Carbon Molecular Sieve for Pressure Swing Adsorption Systems, Adsorption Journal, Vol. 25, 2019, pp. 897–912.
- Effects of Altitude on Industrial Gas Separation Processes, Journal of Industrial Chemistry, Vol. 42, 2022, pp. 1145–1152.
- Membrane Separation Technologies for Nitrogen Generation, International Journal of Gas Engineering, Vol. 18, 2021, pp. 34–47.
- Industrial Nitrogen Generation at Elevated Altitudes, Proceedings of the International Industrial Gas Conference, 2020, pp. 219–226.
Shanghai Sollant Energy Saving Technology Co., Ltd.
As one of the most professional nitrogen generator manufacturers and suppliers in China, we’re featured by quality products and good service. We warmly welcome you to buy bulk advanced nitrogen generator from our factory. If you have any enquiry about cooperation, please feel free to email us.
Address: No.215, Songri Center, Beihongqiao, Jiading District, Shanghai, China
E-mail: info4@sollant.com
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