Compressed Air Dryers

We offer a complete range of Compressed Air Dryers from Parker domnick hunter. Based on the working principal, three types of dryers are available:

  • Refrigerated Air Dryers
  • Desiccant Air Dryers
  • Membrane Dryers

Are all compressed air dryers the same?

Compressed air purification equipment must deliver uncompromising performance and reliability while providing the right balance of air quality with the lowest cost of operation. Many manufacturers offer products for the filtration and purification of contaminated compressed air, which are often selected only upon their initial purchase cost, with little or no regard for the air quality they provide, the cost of operation throughout their life or indeed their environmental impact. When purchasing purification equipment, delivered air quality, the overall cost of ownership and the equipment’s environmental impact must always be considered.

Talk to the Experts!!

Please contact Cleveland Compressed Air Services for accurate selection and sizing of Air Treatment system for optimum efficiency and reliability.


What is refrigeration drying?

The use of refrigeration drying for compressed air treatment is tested and proven for many industrial applications. Dewpoints of 35°F (1.7°C) to 50°F (10°C) are suitable for many indoor applications where a general removal of bulk water and some vapor is sufficient for the end user’s process.

Refrigerated air dryers can be used at low pressures as well as high pressures and use no processed compressed air during the air treatment. Proper sizing factors must be used to determine the correct sized dryer for the application based on actual (or ‘worst case’) flow, operating temperature and operating pressure.

Energy prices are a rising concern and a major cost to manufacturing facilities. Therefore, the refrigerated air dryer has undergone many improvements to make them more energy efficient without sacrificing the quality of the air provided. Refrigerated air dryers use a set of heat exchangers or a single heat exchanger (with chambers) first to pre-cool the air; second, to refrigerate the air to condense out moisture vapor; and last, to re-heat the air to prevent pipe sweating downstream.

Direct Expansion dryers are a type of dryer where the compressed air and the refrigerant come into direct contact via the heat exchanger. While reliable and simple to use, they generally require that the unit continue to run regardless of actual compressed air flow through the dryer.

Cycling dryers utilize a thermal mass as the means to absorb the heat from the compressed air. By chilling a thermal mass, a refrigerant compressor may turn off in times of low demand thereby saving energy by shutting off the refrigerant compressor. There is, however, an additional heat transfer (the thermal mass), so a small amount of additional cost may or may not offset the amount of money saved by shutting off the compressor.


The importance of compressed air as a provider of energy for modern industrial processes is widely known.  What is often overlooked however is the need to provide quality treatment for this air.
In fact, the air entering the compressed air system contains condensate which, when cooled, will turn into liquid water, causing extensive damage not only to the compressed air network, but also to the finished product.

PoleStar Smart Refrigerated Air Dryers actively remove this condensate to achieve extremely dry compressed air.

Our SmartPack heat exchanger offers minimal pressure drops and class leading performance, and significantly increases the efficiency of the whole compressed air treatment process. The innovative SmartControl function automatically and continuously adjusts PoleStar Smart Refrigerated Air Dryer’s operation to the effective working conditions, minimizing operating costs and maximizing performances.

Features & Benefits

  • Optimum dewpoint levels for highest system performance
  • Advanced patented design solutions
  • Environmental, lowest real operating costs
  • High reliability, easy to use and maintain
  • Unique 4-in-1 SmartPack heat exchanger
  • Integral drain
  • Extremely low pressure drop design
  • SmartControl energy saving function
  • Excellent dewpoint performances
  • Advanced compliant scroll compressor


Recent technological advances and the use of highly sophisticated production processes have led to increased market demand for compressed air at pressures of up to 50 barg.

The excellent dewpoint stability from stainless steel compressed air circuits in conjunction with the numerous complex tests which each air dryer must undergo, means that PoleStar Smart HP can guarantee the highest possible quality of finished product.

These also include the most complex technological processes, such as the production of bottles in PET recyclable plastic. In other words, maximum performance at minimum cost.

PoleStar Smart HP furthermore conforms to all major international directives and regulations, including the European PED 97/23 directive and North American ASME standards.

The standard model features:

  • Maximum 50 barg operational pressure
  • Ambient temperature up to 50°C
  • Inlet air temperature up to 65°C
  • Environmentally friendly R407C refrigerant in all models
  • Performance-enhancing condenser pre-filter in PSH120 models and upwards
  • The heat exchanger is made of copper brazed stainless steel plates
  • Inlet and outlet air collectors and condensate separator are entirely made of stainless steel to increase resistance to corrosion effects
  • Integrated timed drain on all models across the range


PoleStar Smart dryers in pair. Twin version of the PoleStar Smart range

All models supplied with master controller, electronic integral drains, manifolds, manual valves and pre-filter with automatic drain.


The small range of refrigeration dryers

The application of high-quality air ensures continuity and reliability of industrial applications, the highest quality standards for finished products and the optimisation of production costs.

Parker Hiross offers a range of refrigerated air drying solutions using advanced refrigeration technology.

Starlette Plus is Parker Hiross’ answer to the specific needs of the industrial user.

Starlette Plus safeguards continuous performance and superior efficiency in every industrial compressed air application. It can easily be adapted to suit all working conditions, maintaining reliable dewpoint control and the lowest possible pressure drops and operating costs.

With its state-of-the-art PlusPack heat exchangers (patent pending) and the most compact dimensions of any system in its class, Starlette Plus is the superior choice for any compressed air treatment application.

Product Features:

  • Extremely compact
  • Low operating costs
  • Environmentally friendly
  • High operating limits
  • Reliable air-tight piston compressors which do not require preheating
  • Simple and secure refrigeration circuits which do not require adjustment during operation and undergo vigorous quality testing in production
  • Large adjustable condenser and fan compartments to guarantee optimum performance even in extreme conditions
  • Security protection in the refrigeration circuit, increasing reliability and safeguarding the air dryer
  • Simple disassembly, with easy access to the internal components for efficient maintenance
  • Drain positioned in a niche, allowing easy access without the need to remove the top panel
  • High-Pressure Version available


What is adsorption drying?

Drying compressed air through adsorption represents a purely physical process in which water vapor (adsorbate) is bound to the drying medium (adsorbent) through binding forces of molecular adhesion.  Adsorbents are solids in spherical and granular form which are permeated by an array of pores.  The water vapor is deposited onto the internal and external surface of the adsorption medium, without the formation of chemical compounds taking place, therefore the adsorption medium does not have to be replenished but only periodically regenerated.

Types of adsorption desiccant air dryers:

  • Heatless desiccant air dryers
  • Externally heated desiccant air dryers
  • Blower purge desiccant air dryers

Heatless desiccant air dryers

The layout of desiccant air dryers with heatless regeneration is clear and simple.  Compared with other desiccant air dryers, pressure dewpoints down to -100oF (-70oC) can be achieved without additional effort.

Use in the higher pressure ranges and at low inlet temperatures causes the quantity of air needed for desorption to be reduced to an economical value.

At low operating pressure the demand for already dried compressed air for purposes of regeneration is increased.  This increase causes a large proportion of the prepared compressed air to be no longer available for productive purposes.

Depending on the cycle, the quantity of air enclosed in the adsorber expands upon release at regular intervals with an emission noise level of about 90 – 95 dB(A).  Given suitable noise attenuation measures, a reduction of the noise emission level to the region of 10 – 15 dB(A) can be accomplished.

The use of desiccant air dryers with heatless regeneration is preferred in the following applications:

  • Capacity range of up to 1000 scfm (1699 m3/hr)
  • Higher pressure ranges
  • High inlet temperatures
  • Installation in explosion proof areas
  • Use underground
  • Portable applications
  • Hazardous locations (pneumatic controls)

Externally heated desiccant air dryers

With their external and autonomous regeneration equipment, externally heated desiccant air dryers are independent of compressor operation.  Widely differing regeneration energy sources as heat carriers result in flexible, economical utilization also in explosion proof areas.  Pressure dewpoints down to -100oF (-70oC) can be achieved with continuous operation.  Pressure release and expansion during switch-over occurs only once within the 4-hour half-cycle and can be programmed to occur in a delayed manner, thus achieving reduced noise emission levels.  Without proper pre-filtration, the regeneration air can be polluted by solids and this may influence not only the adsorber but also its adsorbing material.  Increasing differential pressure inside the adsorber impairs the flow of regeneration air, resulting in a proportionally longer heating time.  High inlet temperature accompanied by low operating pressure to reduce the capacity of the drying medium considerably, at the same time increasing the heat of reaction up to the lower range of regeneration temperatures, so that reliable adsorption is no longer assured throughout the entire cycle.

Externally heated regeneration desiccant air dryers are used:

  • For pressure dewpoints down to -100oF (-70oC)
  • Medium pressure and temperature ranges
  • For CO2 gas drying
  • If the ambient air contains a high dust level
  • In an atmosphere rich in toxic substances

Blower purge desiccant air dryers

Desiccant air dryers with external heat regeneration and an ambient blower system require only small quantities of processed and treated compressed air for purging and for building up pressure.  The quantity of air required for regeneration is blown in, or drawn in from the surrounding atmosphere by means of a blower.  A desiccant air dryer with vacuum regeneration forms a logical and consistent further development.  There is a growing tendency for using such system also in tower performance ranges thanks to the efficiencies that can be realized.  Operating by blower regeneration offers a wide ranging freedom for adaptation to problematic marginal conditions.  The regeneration system, consisting of a blower and a heater, is selected from a wide range of choices.  Using different materials, customer specific requirements can be met.

We deal in 3 types of Desiccant Dryers based on the application:

  • Modular
  • Point of Use
  • Twin Tower



The PNEUDRI range of heatless desiccant air dryers has proven to be the ideal solution for many thousands of compressed air users worldwide and in a wide variety of industries.  Flow rates begin at 3 scfm (5.1 m3/hr.).  Due to PNEUDRI’s “multi-banking” capability, the system can meet any required demand.

PNEUDRI heatless desiccant air dryers totally clean and dry compressed air down to -40oF (-40oC) pressure dewpoint (PDP) as standard.

For critical applications, PNEUDRI heatless desiccant air dryers can be specified to provide a pressure dewpoint of -100oF (-70oC) pdp.  It is worth noting that a pressure dewpoint of -14.8oC (-26oC) or better will not only prevent corrosion, but will also inhibit the growth of micro-organisms within the compressed air system.


Zander Series of Modular Desiccant dryers come in the following models:

  • AKM Series Oil Vapor Adsorbers
  • EcoDry HDK-MT MultiTronic High Pressure Desiccant Air Dryers (1450 – 5075 psi g)
  • EcoDry KA-MT Series Oil-Free Purification Package (4 – 50 scfm)
  • EcoDry KMT MultiTronic Heatless Desiccant Air Dryers (4 – 50 scfm)
  • EcoDry ZME Series Heatless Desiccant Air Dryers (106 – 176 scfm)
  • EcoDry ZMX Series Heatless Desiccant Air Dryers (240 scfm and Larger


FDD Desiccant Dryer Series:

  • 1/4″ to 1″ NPT Ports
  • Capacities to 60 SCFM
  • Pressure Dewpoints Down to -40° F

Finite® Filter’s unique in-line air/gas dryer system is engineered for easy desiccant changeouts, longer life and lower pressure drop.

The FDD Series is designed to remove water vapor and aerosols at point-of-use for intermittent flows up to 60 SCFM. Finite dryers do not require steady flow for constant dewpoint suppression.

A color changing moisture indicator with visual sight gauge indicates the need for desiccant replacement.

Standard Features

  • Zinc Head/Steel Bowl with Integral Sightglass
  • Sintered Bronze Elements (prevent desiccant carry over)
  • Collar Designed for Easy Changeouts
  • Maximum Operating Temperature: 180° F
  • Maximum Working Pressure: 300 PSI
  • Optimum Working Temperature: Below 100° F


  • Intermittent Air Use
  • Clean, Dry Air for Pneumatic Applications
  • Instrument Protection
  • Air Tools Protection Against Gumming and Oxidation
  • Auto Body Paint Systems –
  • Helps Prevent Fish Eye Defects
  • Valve Actuation – Instrument Air


We can offer you with a number of different options in the Twin Tower category:

  • AIRTEK Series (Heatless, Heated, Blower Purge, High Pressure)
  • BALSTON Regenerative PSA Desiccant Air Dryers
  • Domnick Hunter Twin Tower Desiccant Dryers (Heatless, Heated, Blower Purge, Vacuum Assist Zero Purge)
  • ZANDER Twin Tower Desiccant Dryers (Heatless, Heated, Blower Purge, Vacuum Purge)


Membrane material selectively permeable to water vapor are an excellent medium for producing dry air from standard compressed air. Water vapor from the compressed air supply passes through the hollow fibers of the membrane. At the same time, a small portion of the dry air product is redirected along the length of the fibers to sweep out the water vapor laden air which has permeated the membrane. The moisture-laden sweep gas is then vented to the atmosphere, and clean, dry air is supplied to the application. The drying power of the membrane is controlled by varying the compressed air flow rate and pressure.

The Balston Membrane Air Dryer is designed to operate continuously, 24 hours per day, 7 days per week. The only maintenance required is changing the Prefilter cartridge twice a year. This semi-annual maintenance takes approximately 5 minutes.

Parker Balston Membrane Air Dryers combine superior coalescing technology with a proven innovative membrane system to supply clean, dry compressed air with dewpoints as low as -40°F (-40°C). Balston Membrane Air Dryers are engineered for easy installation, operation, and long term reliability. The Membrane Dryers incorporate high efficiency coalescing filtration and the highest efficiency membrane available to provide low cost operation and minimal maintenance.

Features & Benefits of Parker Balston Membrane Air Dryers

  • Require no electricity
  • Dewpoints as low as -40°F
  • Explosion proof
  • Silent operation
  • No desiccant to change
  • Prevent freeze-ups
  • Low operating cost
  • Reliable, efficient economical alternative to PSA and refrigerant dryer technologies


  • Low dewpoint instrument air
  • Pneumatic equipment
  • Pressurize electronic cabinets
  • Analytical instrumentation
  • Instrument air for analyzer buildings
  • Dry air for hazardous areas
  • General laboratory air supply
  • Prevention of freeze-ups
  • Protect electrical panel components from moisture damage

Speak to us today

We know that your business looks for every competitive edge in a tough marketplace. Reducing the cost of energy overhead is a challenge and we offer quality solutions through high calibre products and services. At Cleveland Compressed Air Services, we believe that your success is our success. That is why we provide top notch solutions and support to businesses using our quality products, whether through purchase or hire. After purchase or hire, our stellar customer care draws from a nationwide network of manufacturer trained technicians, ready to serve you 24 hours per day, seven days a week.

Ready for solutions to compressed air or energy problems?  Please call us at +61 8 9452 3669, email us at or contact us online.