CompAir AX_T Series
Efficient, heatless desiccant dryers
The Twin-Tower Series from CompAir offers a particularly reliable and easy-to-maintain solution for drying compressed air – ideal for demanding industrial applications. Thanks to its robust construction, proven operating principle and numerous configuration options, this dryer range meets the highest requirements for compressed air quality, operational reliability and energy efficiency.
Whether in production, automation, food technology or OEM systems – the Twin-Tower dryers deliver consistent compressed air with a low dew point, reliably protecting systems and processes against moisture, corrosion and microbial contamination.
Pressure dew point
−40 °C, opt. down to −70 °C
Protection rating
IP54, opt. IP65
Energy saving
up to 60% (with EMS)
Design
Twin-Tower, heatless
Reliable drying through heatless adsorption
The Twin-Tower dryers work on the principle of heatless adsorption (Pressure Swing Adsorption, PSA). Two towers filled with desiccant (desiccant columns) alternately take over drying and regeneration:
- Drying phase: the compressed air flows through a tower in which a specially coated desiccant (e.g. aluminium oxide or silica gel) adsorbs the moisture.
- Regeneration phase: a small portion of the already dried air is used to regenerate the second tower. The stored water is discharged by depressurisation – without any heating elements.
- Switchover: after a defined cycle time, the towers switch automatically so that dry compressed air is available at all times.
With optional dew point control, the cycle duration can be adjusted dynamically. This saves valuable purge air and significantly reduces energy consumption – especially with fluctuating moisture loads or part-load operation.
Features & properties in detail
Technical features & benefits
- Reliable pressure dew point: standard –40 °C, optionally down to –70 °C
- Compressed air quality according to ISO 8573-1:2010: class 2 (particles up to 1 μm), class 2 water (–40 °C)
- Flow rate range: models available for small, medium and large systems
- High operational reliability: fail-to-shift monitoring, PLC control, visualisation on digital display
- Low-noise operation: silencer and optimised exhaust air routing
- Modular & configurable: ideal for OEM, point-of-use applications or central systems
- Energy efficiency: optional Energy Management System (EMS) with dew point monitoring saves up to 60% energy
Standard equipment:
- PLC control with digital display
- Automatic switchover and cycle monitoring
- High-performance pre-filter & after-filter
- Pressure gauge on each tower
- Moisture indicator
- Control enclosure with IP54 protection rating
Optional extensions:
- EMS with dew point measurement and adjustable cycle time
- Fail-to-shift alarm (signal in the event of a switching fault)
- 4–20 mA interface for remote monitoring/SCADA
- IP65 protection rating or stainless steel housing
- Vessel configurations for customer-specific installations
Applications of the AX_T Series
The Twin-Tower dryers from CompAir are suitable for a wide variety of industries and applications:
- Production plants with constant air demand
- Control and automation technology
- Pneumatic systems in sensitive environments
- Food and medical technology (optionally with oil-free downstream treatment)
They are particularly suitable for situations where heating should not or must not be used and where robust technology with high reliability is required.
Conclusion: proven technology with many advantages
CompAir Twin-Tower Heatless desiccant dryers offer a reliable, energy-efficient and low-maintenance solution for drying compressed air. Thanks to their modular design, intelligent control and a wide range of options, they can be optimally adapted to almost any application – and deliver consistently dry, ISO-compliant compressed air.
AX_T Series model overview
| Model | Connection size | Capacity | Weight | Dimensions (mm) | |||
|---|---|---|---|---|---|---|---|
| m³/h | m³/min | kg | Length | Width | Height | ||
| AX67TF | 1 ½" | 400 | 6,7 | 285 | 2160 | 825 | 530 |
| AX83TF | 1 ½" | 500 | 8,3 | 400 | 2380 | 796 | 550 |
| AX125TF | 2" | 750 | 12,5 | 520 | 2117 | 970 | 620 |
| AX150TF | 2" | 900 | 15,0 | 700 | 2305 | 970 | 620 |
| AX167TL | 2" | 1000 | 16,7 | 828 | 2131 | 1440 | 1035 |
| AX267TL | 3" | 1600 | 26,7 | 1440 | 2185 | 1928 | 1460 |
| AX333TL | 3" | 2000 | 33,3 | 1500 | 2185 | 1928 | 1460 |
| AX417TL | DN100 PN16 | 2500 | 41,7 | 1800 | 2041 | 1982 | 1530 |
| AX550TL | DN100 PN16 | 3300 | 55,0 | 2300 | 2349 | 2132 | 1652 |
| AX767TL | DN100 PN16 | 4600 | 76,7 | 2654 | 2349 | 2132 | 1652 |
| AX933TL | DN150 PN16 | 5600 | 93,3 | 2950 | 2535 | 2438 | 1791 |
| AX1133TL | DN150 PN16 | 6800 | 113,3 | 3360 | 2535 | 2438 | 1791 |
| AX1417TL | DN150 PN16 | 8500 | 141,7 | 4400 | 2344 | 2677 | 1945 |
* Further technical data can be found in the product information in the download section below…
Frequently asked questions
How does an AX_T Series twin-tower dryer work?
Two towers filled with desiccant work alternately. One dries the compressed air while the other is regenerated by depressurisation using a small portion of the dried air, without any heating elements. After a set cycle time, the towers switch over automatically.
What pressure dew point does the AX_T Series achieve?
−40 °C as standard, optionally down to −70 °C.
What installation sizes is the AX_T Series available for?
There are models for small, medium and large installations. The series is suitable for OEM systems, point-of-use applications and central systems.
How can energy consumption be reduced?
With the optional Energy Management System (EMS). It measures the dew point and adjusts the cycle time. This saves purge air and up to 60% of energy, especially with fluctuating moisture loads or at part load.
What is included as standard?
PLC control with digital display, automatic switchover with cycle monitoring, pre-filter and after-filter, pressure gauge on each tower, moisture indicator and a control enclosure rated IP54.
Which options are available?
These include EMS with dew point measurement, a fail-to-shift alarm, a 4–20 mA interface for remote monitoring or SCADA, IP65 protection or a stainless steel enclosure, and customised vessel configurations.
In which industries is the AX_T Series used?
In production plants with constant air demand, in control and automation engineering, for pneumatics in sensitive environments, and in food and medical technology.
When is a heatless dryer the right choice?
Above all where heating should not or must not be used, and where robust technology with high reliability is required.
Who can help me choose the right model?
We can. We clarify the flow rate, pressure dew point and compressor output with you and select the right model. Call us or write to us.
Which dryer suits your application?
There are various pressure dew points and flow rates, which vary depending on compressor output and field of application and must be taken into account. Let us advise you to find the optimum model for your needs.