Traitement de l’air comprimé

Quality air is the guarantee of a healthy and controlled industrial process. Thus, for more than 30 years, we have been using our know-how for the sustainability of your industry by offering you filtration and drying solutions adapted to the most demanding needs.

Low pressure (<16 bar) direct expansion refrigeration air dryers

27 m³/h (0.45m3/min)  > 9000 m³/h (150m3/min)
Low pressure (<16 bar) direct expansion refrigeration air dryers

Our EXPANSIA range of dryers uses the principle of direct expansion refrigeration in order to effectively dry compressed air produced upstream in the network. Thanks to its efficient refrigration system and our patented 3-in-1 exchanger, the compressed air is dried by an optimal exchanger, the compressed air is dried by an optimal exchange of heat in contraflow over the entire contat surface.

Our stainless steel plate heat exchanger consists of an air/air exchanger, which pre-cools the moists, water-saturated air, and an air/refrigerant fluid exchanger, which cools the compressed air down to a temperature of +3°C, thus ensuring the evacuation of moisture through an integrated separator. This patented heat exchanger, resulting from a collaboration between CTA and the world's lagest equipment manufacturers, provides efficient cooling whatever the air intake conditions and ambient temperature, and also lowers resistance to circulation of the compressed air to a very limited level, generating a low pressure drop within the air.

With a wide range of air handling solutions from 27m3/h to 9,000m3/h, there is a model to suit your process.



Secteurs d'application

Outils pneumatiques

Attributs techniques

Réfrigérant R134a Réfrigérant R407c Froid Circuit frigorifique 1 Utilisation Intérieure Compresseur scroll Échangeur à plaques Ventilateur hélicoïde

3-in-1 heat exchanger

Made up of brazed stainless steel plates (AISI316), it allows for great energy savings thanks to its economiser pre-exchanger, its low pressure drop and its high-performance separator. Its brazed stainless steel plates prevent all types of corrosion due to humidity and ensure the longest life on the market.

Refrigeration circuit

It includes all the safety features as standard in order to prevent faults from being generated by misuse. The purpose of these devices is to protect the refrigeration air dryer, but above all to ensure that it functions properly and that the user's process is maintained.


Hermetic refrigeration compressors (piston, rotary, scroll) that provide adequate cooling to maintain the dew point under all conditions of use.


From the N-DHR 0015 model onwards, the controller is designed to optimise the operation of the dryer with a dew point display, control of the condensate drain and the correct functioning of the refrigeration circuit. In addition, it allows the reporting of all alarms and malfunctions on the dryer as well as the reminder of maintenance deadlines.

Energy saving

Starting with the N-DHR 0200, Expansia dryers are equipped with Digital Scroll compressors that adapt their refrigeration output to the heat load to be dissipated, thus saving a lot of energy.

Low energy costs

High performance design through its 3-in-1 exchanger which ensures an extremely low pressure drop of 0.15 bar at the expressed nominal flow rate.

Plug and Play product

Direct expansion refrigeration dryer ready for use with all components directly integrated and allowing easy operation. Expansia dryers are supplied with a power cable, which allows commissioning without having to open the dryer.

Optimised air circulation

The fan mounted directly in its own housing on the condenser allows for optimum efficiency of the available cooling capacity even at high ambient temperatures.

Record durability and high strength

Its reinforced body, painted in baked epoxy, ensures a long life even in the most corrosive and dusty environments. Its high efficiency condenser, equipped with robust fins, swept by the air without any obstacle allows the possibility of a cleaning and a great behavious in time.

Simplified maintenance

Easy access from the top and side panels of the device allows for optimal maintenance of the dryer. The refrigeration design of the Expansia dryers ensures direct access to all components.

Air flow[m3/h]2739548410816225833040848666090010801380180021602580366043204740654072609000
Air flow [scfm]162332496495152194240286388530636812105912711518215425422789384942735297
Weight[kg]27 28 29 31 36 39 55 699210111513514516519822525642050057093011201260
Electrical power[kW] 0,21 0,22 0,23 0,28 0,29 0,56 0,52 0,58 0,81 1,00 1,37 1,61 2,01 2,48 2,83 3,92 4,63 5,66 7,84 9,26 11,32 15,68 18,52
Power supply[V/P/F] 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50
Number of circuits[n°]11111111111111111222444
Réfrigerant[HFC] R134a R134a R134a R134a R134a R134a R134a R134a R134a R407c R407c R407c R407c R407c R407c R407c R407c R407c R407c R407c R407c R407c R407c

Contact us