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Compressed Air Dryers

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Discover compressed air dryers and protect your air compressor set up

If you have experience using an air compressor, you may have observed the presence of moisture in the air. This is due to the fact that water cannot be compressed like air can. When air is compressed, the moisture content per unit volume increases, leading to condensation. It is essential to use compressed air dryers to eliminate this moisture, as it can result in corrosion, quality problems, and the growth of microorganisms in your air system.

What is a compressed air dryer?

Dryers are essential for removing extra moisture from compressed air, ensuring industry compliance and safeguarding your air compressor system. Consider refrigerant (fridge), adsorption, and membrane dryers, each offering unique advantages to help you manage costs and maintain air quality standards. Choose the right type to meet your specific needs and requirements.

Talk to our team today about compressed air dryers Talk to our team today about compressed air dryers

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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Different types of compressed air dryers:

Refrigerant dryers, commonly used in various applications, are designed to maintain a PDP of +3 °C/37.4 °F. They feature both air-to-air and air-to-refrigerant heat exchangers and can be either air-cooled or water-cooled. Pneumatech provides a range of options including non-cycling, cycling, and VSD refrigerant dryers to meet specific efficiency and investment needs.

Adsorption or desiccant dryers utilize a hygroscopic substance such as silica gel to remove moisture from compressed air. The air passes through the material, effectively drying it. These dryers can achieve a Pressure Dew Point (PDP) ranging from -10 °C/14 °F to -70 °C/-94 °F. In order to maintain consistent performance, adsorption dryers are equipped with two drying vessels. One vessel is used for drying the incoming compressed air, while the other is used for regenerating the desiccant material. Our dryers employ three different methods for regeneration: purge regeneration (also known as "heatless-type dryers"), heated purge, and blower regeneration.

Membrane dryers utilize a technique known as "selective permeation." They are made up of a cylinder that contains numerous small hollow polymer fibers coated on the inside. By selectively allowing certain molecules to pass through, these fibers eliminate water vapor, reaching typical PDP levels of +3 °C/37.4 °F.



Importance of air dryers in NZ

Compressed air dryers are crucial for maintaining the reliability and integrity of your air system, as well as meeting the ISO 8573-1 standards. These regulations determine the permissible levels of contaminants, such as water, in treated air. The standard outlines various air quality classes, each with specific requirements for Pressure Dew Point (PDP) levels. For instance, Class 1 under ISO 8573-1 necessitates a PDP of -70 °C/-94 °F, while Class 4 indicates a PDP of +3 °C/37.4 °F.


The use of compressed air dryers in New Zealand is required in countless industrial and professional applications