Our offices are closed from the 21st December until 6th January.

Nitrogen Generators

Discover high-quality nitrogen and oxygen production on location in New Zealand using our state-of-the-art Pneumatech N2 and O2 gas systems. Eliminate the inconvenience of managing gas cylinders, benefit from cost-efficient options, and guarantee purity levels customized to meet your unique requirements no matter your industrial application.


  help @ashair.co.nz


Onsite gas generation tailored to your needs

How does a nitrogen generator work?

To produce your own nitrogen, all you need is a compressor and a nitrogen generator. That’s because air consists of 78% nitrogen and 21% oxygen. When you feed compressed air into a nitrogen generator, it separates the N2 from the O2. There are two main technologies to produce nitrogen:

PSA technology
Utilizing PSA technology, Pressure Swing Adsorption (PSA) effectively isolates nitrogen from compressed air by utilizing adsorbent materials. By passing the air through a vessel containing Carbon Molecular Sieves (CMS), the oxygen is captured, allowing only nitrogen of up to 99.999% purity to exit. PSA generators are well-suited for applications requiring high-flow and high-purity nitrogen.

Membrane technology
Membrane technology is a very simple, reliable and continuous N2 production method. Compressed air is pushed through hollow polymer membranes. The oxygen in the air escapes through the fiber walls and permeates into the atmosphere. This leaves quality nitrogen with a purity between 95% and 99.5% at the generator outlet.

Talk to our team today about nitrogen generators Talk to our team today about nitrogen generators


Online Shop

Shop online for quality air compressors, fittings, air tools, air regulators, pressure switches, and maintenance kits for NZ businesses and DIYers. Hassle-free, secure payment with Afterpay, nationwide delivery.

Sub Categories

Air Compressors & Treatment

From powerful rotary screw compressors to reliable piston air compressors, we offer a comprehensive range. Explore top-quality air compressors and treatment solutions in New Zealand with Alup and Chicago Pneumatic. Enhance your compressed air system with our refrigerated and desiccant air dryers. Trust us for sales and service of premium air compressors in NZ.

Sub Categories

Vacuum Pumps & Blowers

The team at Ash Air has an extensive range of top quality vacuum pumps and equipment, including rotary vane pumps, liquid ring pumps, claw pumps and screw pumps that are low maintenance, energy-efficient, reliable, affordable and hard working.

Sub Categories

Nitrogen & Oxygen Gas Generators

Our nitrogen gas generators offer excellent all-in-one solutions, with technologically-advanced systems, are very convenient, space saving and easy to install. Our nitrogen generators have impressive control and monitoring capabilities with very reliable purity settings and long-lasting membrane technology.

Sub Categories

2.5HP 50L Oil-Free Dental Air Compressor Clean Air Class Zero Certified

2.5HP 50L Oil-Free Dental Air Compressor Clean Air Class Zero Certified

$3,700.00 NZD exc.
$4,255.00 NZD inc.

Ask me when I'm back in stock

Product Enquiry Product Enquiry
1.5HP 25L Oil-Free Dental Air Compressor Clean Air Class Zero Certified

1.5HP 25L Oil-Free Dental Air Compressor Clean Air Class Zero Certified

$2,450.00 NZD exc.
$2,817.50 NZD inc.

Ask me when I'm back in stock

Product Enquiry Product Enquiry
6.5HP 50L Cast Iron Petrol Air Compressor SF302 KOHLER

6.5HP 50L Cast Iron Petrol Air Compressor SF302 KOHLER

$1,950.00 NZD exc.
$2,242.50 NZD inc.

IN STOCK

Add to Cart Add to Cart
3HP 100L Belt Drive Cast Iron Piston Air Compressor SF302HD

3HP 100L Belt Drive Cast Iron Piston Air Compressor SF302HD

$1,900.00 NZD exc.
$2,185.00 NZD inc.

IN STOCK

Add to Cart Add to Cart
3HP 50L Belt Drive Cast Iron Piston Air Compressor SF302HD

3HP 50L Belt Drive Cast Iron Piston Air Compressor SF302HD

$1,750.00 NZD exc.
$2,012.50 NZD inc.

IN STOCK

Add to Cart Add to Cart
3HP 100L Belt Drive Cast Iron Piston Air Compressor 'Ironman' CPBC-3100

3HP 100L Belt Drive Cast Iron Piston Air Compressor 'Ironman' CPBC-3100

$1,434.90 NZD exc.
$1,650.14 NZD inc.

IN STOCK

Add to Cart Add to Cart
5.5HP 30L Twin Tank Petrol Air Compressor (12.4 cfm, 10 bar) CPBA-55E

5.5HP 30L Twin Tank Petrol Air Compressor (12.4 cfm, 10 bar) CPBA-55E

$1,433.90 NZD exc.
$1,648.99 NZD inc.

Ask me when I'm back in stock

Product Enquiry Product Enquiry
3HP 100L Belt Drive Piston Air Compressor CPBA-3100

3HP 100L Belt Drive Piston Air Compressor CPBA-3100

From $1,306.90 NZD exc.
$1,502.94 NZD inc.

IN STOCK

Add to Cart Add to Cart
CP7769 Heavy Duty 3/4" Impact Wrench, Max Torque 1950 Nm

CP7769 Heavy Duty 3/4" Impact Wrench, Max Torque 1950 Nm

$1,095.00 NZD exc.
$1,259.25 NZD inc.

IN STOCK

Add to Cart Add to Cart
3HP 50L Belt Drive Piston Air Compressor CPBA-350

3HP 50L Belt Drive Piston Air Compressor CPBA-350

From $1,019.90 NZD exc.
$1,172.89 NZD inc.

Ask me when I'm back in stock

Product Enquiry Product Enquiry
2.5HP 50L Belt Drive Cast Iron Piston Air Compressor 'Ironman' CPBC-2550

2.5HP 50L Belt Drive Cast Iron Piston Air Compressor 'Ironman' CPBC-2550

$968.90 NZD exc.
$1,114.24 NZD inc.

IN STOCK

Add to Cart Add to Cart
CP7763 3/4" Super Duty Impact Wrench, Max Torque 1,630 Nm

CP7763 3/4" Super Duty Impact Wrench, Max Torque 1,630 Nm

$948.27 NZD exc.
$1,090.51 NZD inc.

IN STOCK

Add to Cart Add to Cart


What is a nitrogen generator?

A nitrogen generator is a machine that separates nitrogen from compressed air, which consists of 78% N2 and 21% O2. A gas generator is the easiest, most flexible, cost-efficient and sustainable way of obtaining your own nitrogen supply.


The benefits of on-site nitrogen generation

On-site generation offers convincing benefits compared to liquid or gaseous N2 deliveries.

1. Cost efficiency
Producing your own nitrogen with the purity you need allows you to significantly reduce your cost of gas

2. Sustainability
Eliminate the transport emissions that nitrogen deliveries generate. In addition, Pneumatech’s on-site generation solutions are super efficient, minimizing your energy use and your environmental footprint.

3. A reliable nitrogen supply
No need to count on external vendors. On-site generation gives you complete control over your nitrogen supply.

4. No logistics
Say goodbye to always monitoring your N2 supply, working with vendors, and tracking and handling deliveries. 


The use of nitrogen is required in countless industrial and professional applications