Nitrogen Generator St Andrews
On-Site Nitrogen Generation St Andrews
Most businesses in St Andrews still get nitrogen delivered in bottles. A nitrogen generator changes this by making gas on-site from your compressed air supply. You set the desired purity level, and the generator runs when you switch it on.


How Nitrogen Generation Works
Nitrogen makes up 78% of the air around us. Generators separate it from other gases using two primary methods.
Membrane Separation
Membrane generators push compressed air through a hollow fibre membrane. Oxygen and water vapour pass through the membrane walls. Nitrogen stays behind. These units produce nitrogen with a purity of 95% to 99.5%.
Pressure Swing Adsorption
These generators use carbon molecular sieves in two pressure vessels. At high pressure, oxygen molecules stick to the carbon, whilst nitrogen passes through.
When the pressure drops, the oxygen is released and vents away. One vessel produces nitrogen while the other regenerates. This method can produce nitrogen up to 99.999% purity.

Uses For Nitrogen In St Andrews
Businesses across St Andrews use nitrogen for different processes. We've installed generators for companies in food production, electronics, and manufacturing.
- Food packaging operations use nitrogen to flush oxygen from packages. This stops bacteria growth and extends shelf life without chemical preservatives.
- Chemical and pharmaceutical companies use nitrogen because it doesn't react with most substances. It moves powders through production lines and protects products during packaging.
- Electronics manufacturers solder components in nitrogen atmospheres. This reduces oxidation and improves joint quality.
Why Businesses Choose Nitrogen Generators
Making your own nitrogen removes several problems that come with gas deliveries.
No Delivery Scheduling
Bottled nitrogen means estimating how much you’ll use each month. Get it wrong and you either run out or have bottles taking up space. A generator makes nitrogen when you turn it on.
Fewer Lorry Movements
Gas bottles arrive on lorries from suppliers, often from central depots. A generator cuts these delivery trips. For businesses that use nitrogen daily, this makes a significant difference to their carbon footprint.
Lower Running Costs
Bottled nitrogen pricing includes the cost of manufacturing the bottles, filling them, and delivering them to your site. When you make nitrogen from compressed air, you’re only paying for electricity and maintenance. Most businesses see their nitrogen costs drop by 40-50%. Payback periods are typically 12-18 months.

Getting Started With Nitrogen Generation
We assess your current nitrogen use before recommending a generator. This includes checking your flow rates, purity requirements, and how much you’re spending on bottled gas.
Our nitrogen audit covers your compressed air system, too. The generator needs clean, dry air to work properly. We’ll check if your compressor and air treatment equipment can handle the extra load.
We supply Atlas Copco nitrogen generators. These come with service packages that include filter changes and routine maintenance. We stock spare parts at our Airdrie depot for quick repairs.
Companies in St Andrews typically ask us why they waited so long to install a generator. To discuss nitrogen generation for your business, call us on 01236 751922.
EXCELLENT Based on 47 reviews Posted on John Lewis20/06/2023Trustindex verifies that the original source of the review is Google. Best compressed air company in Scotland 🏴Posted on Dylan Walker03/05/2023Trustindex verifies that the original source of the review is Google. A very professional service with experienced personnel on hand to advise, install and service our equipment. Overall, a very honest company to deal with.Posted on Sandy Fowler03/05/2023Trustindex verifies that the original source of the review is Google. I have been using Design Air since their business commenced back in 2003. They have always been extremely helpful with my enquiries and acted immediately with any issues that we have had on site. When purchasing equipment their technical help and expertise have meant a cost saving to our company. There backup is superb and their service and installation first class. As a business they a very easy to deal with. Would highly recommend.Posted on The Gavnor03/05/2023Trustindex verifies that the original source of the review is Google. Great team of owner/managers who are invested in their customers' futures, so take the time and attention to communicate well and plan throroughly at the front end, giving good advice and providing a robust back-up service to ensure that efficiencies are achieved.Posted on john campbell03/05/2023Trustindex verifies that the original source of the review is Google. Brilliant firm and always there when we needed service or brake down, highly recommended 👍Posted on Philips Garage TerraClean Glasgow03/05/2023Trustindex verifies that the original source of the review is Google. A huge thanks to Murray & the team for delivering great products & services to Philips Garage. Would thoroughly recommend to all.Posted on Cherine Snook28/04/2023Trustindex verifies that the original source of the review is Google. Design Air supplied, commissioned, and they have been servicing and maintaining our Atlas Copco compressor at Vision Dental Laboratory for the past 8 years. They pro-actively remind us when our service is due each year and then try and keep transport costs down by servicing other clients in the area on the same day. The Service Engineers are always friendly, knowledgeable and efficient. Design Air are receptive and responsive to feedback of any kind and have proven to be a great bunch to work with. A fantastic company and service provider, which we highly recommend !Posted on Scott Averall28/04/2023Trustindex verifies that the original source of the review is Google. We have been using Design Air for many years now and they provide an excellent, value for money service. They have helped design & Install systems for all of our factories as well as providing servicing. Very fast response times with any issues we have. Would highly recommend.Posted on Allan Boyle28/04/2023Trustindex verifies that the original source of the review is Google. Great company. We have had fantastic service for over 10 years. Would highly recommend. Allan Boyle - Rentokil-InitialPosted on The Start-Up Drinks Lab26/04/2023Trustindex verifies that the original source of the review is Google. Although Design Air are fairly new to us, we have been incredibly impressed with the customer service and transparency given by the team (shout out to Murray specifically!). The advice and additional help provided has been really valuable to us and we would happily recommend them to anyone.
Where To Find Design Air
Design Air (Scotland) Ltd
Unit 9, Block 4, Chapelhall Industrial Estate, Airdrie, North Lanarkshire, Scotland, United Kingdom, ML6 8HQ
Fill in our contact form below and we’ll be sure to get back to you as soon as we can.
Office Opening Hours
| Mon – Fri | 08:00 – 17:00 |
| Sat – Sun | Closed |
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