Adsorption Type Heatless Compressed Air Dryers

Drowning Efficiency : Problems caused by water in compressed Air :

The necessity of air dryers in a compressed air system cannot be overstated. Many tools and processes reliant on compressed air are intolerant to water or moisture.

As part of the compression cycle, free water is often formed, leading to corrosion and rust in the system. Rust particles can be transported through the compressed air circuit, causing equipment damage and product contamination.
Unwanted moisture can also sustain bacteria growth or be absorbed by processed products, leading to quality issues and product spoilage.
Problems like rust deposits, equipment malfunction, solidification of media, and paint imperfections due to bubbling or the “orange peel effect” result in inefficiencies, material waste, and increased downtime.

To mitigate these issues and ensure an effective pneumatic system, utilizing air dryers to produce clean, dry compressed air is essential, reducing unnecessary costs and safeguarding the system against damages.

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The Two Ways to Remove Moisture:

Refrigeration Type Air Dryers

Cooling is the most effective method for removing moisture from compressed air. Our Refrigerated Air Dryers utilize a closed-loop Refrigerant circuit to cool the compressed air to a controlled temperature, causing condensed moisture to be separated. To prevent freezing, the air/gas can be cooled to a 2 minimum temperature of around +2-3°C at 7Kgf/cm² operating pressure, ensuring optimal performance. These dryers are suitable for applications where atmospheric dew points of -20 to -22°C are acceptable.

Refrigerant dryers consist of an air-to-air heat exchanger and an air-to-refrigerant heat exchanger. In the first phase, incoming air is pre-cooled by outgoing air. In the second phase, compressed air is further cooled to approximately 3°C in the Freon circuit, condensing the moisture. The relative humidity drops to below 50% in the subsequent heating phase. Refrigerant dryers prevent free water and corrosion in the system, achieving efficient and reliable moisture control. Available in water-cooled and air-cooled variants.

Heatless Adsorption Type Dryers

Desiccant air dryers, particularly the Heatless Type, are perfect for compressed air applications requiring a pressure dew point below 0°C. These dryers leverage the natural desiccant phenomenon to achieve efficient moisture removal.

The Heatless Type Dryer consists of two adjacent pressure vessels filled with hygroscopic beads, known as desiccant. Wet air is automatically cycled between the two desiccant towers, with one adsorbing moisture while the other regenerates.

In operation, the wet air enters one tower, where the desiccant bed adsorbs the saturated moisture. A small portion of dried air at ambient temperature and pressure then passes through the desiccant bed in the second tower for regeneration and is purged to the atmosphere. Cold regeneration consumes around 8-10% of compressed air, making it relatively costly. Nevertheless, these dryers provide a steady supply of super dry air with dew points ranging from -70°C to -80°C at atmospheric pressure, making them highly effective for critical applications requiring superior moisture control

Other Types of Adsorption Dryers Offered are

Embedded Internal Heat Regenerated Adsorption Dryers
Blower Heat Regenerated No-Loss Adsorption Dryers
Split Flow No-Loss Adsorption Dryers
Heat Of Compression No-Loss Adsorption Dryers

Features & Benefits

Rapid Heat Transfer

Brazed Plate Heat Exchanger Technology for much better efficiency than traditional Coil Heat exchangers.
3-in-1 Heat exchanger technology for efficient Pre-cooling, Freon cooling and moisture separation, all in one compact heat exchanger.

Ease of Use

Fully automatic push-button-start equipment.
No dedicated operators required.

Customization Options

Customization options to tailor the Air Dryers to your specific requirement.
We ensure that our Dryer fit perfectly into your unique compressed air setup.

Multiple Dew Point Options

One stop solution to all your Dryer requirements.
Wide range of dew point options, to choose the most suitable dew point for your specific application.
Dew Points from -20°C to -80°C are achievable.

Durable Constructions

Panurgy Air Dryers are built with high-quality components.
Our fully modular skid-mounted design allows for easy access to all maintenance points.
Reduced Downtimes and quick maintenance.
Gradual depressurisation and re-pressurisation prevent bed attrition.
Interior Epoxy Coating on towers for Enhanced Protection.

Compliance with Industry Standards

We meet or exceed industry regulations, ensuring compliance and safety in your compressed air system.
Fabricated as per ASME sec. VIII, Div-1 or IS 2825 codes.

Expert Technical Support

Panurgy offers expert technical support on thousands of applications.
We can help you choose the right Dryer for your application.

Dew Point Selection :

“Dew point is the measure of moisture content in air. It is the temperature at which moisture content present in the air, starts condensing. Lower the dew point, drier is the air”. Air of -40°C Dew Point means no moisture would condense unless temperature of the air is reduced to less than -40°C. Lower the Dew Point, higher would be the operating cost of Air Dryer. Hence proper selection of Dew point is very important for economical operation of the unit.

Applications

R: refrigerated type, H: heated type, HL: heatless type air dryer, NS: Not Specified.

Quality classes for compressed air according to ISO/DIN 8573/1. Above selection chart is only indicative. For final selection, capacity and ambient conditions are important. For detailed selection, consult Panurgy application engineers.