The scope of application for compressed air dried by using refrigeration dryers are generally frost-free indoor installations and compressed air applications with low requirements in terms of the degree of dryness, such as instrument air, blast air, pneumatic tools. Refrigeration dryers are usually used to centrally prepare the compressed air to a "basic degree of dryness", which is suitable for most installed compressed air applications. Higher degrees of dryness are created for individual applications in a decentralized process and thus only produced in required quantities.
Refrigeration dryers promote premature condensation of the moisture contained in the compressed air by actively cooling it. The generated condensate is collected in the refrigeration dryer and drained off. The compressed air is then brought to an undersaturated state through warming and thus it is dried. Pressure dew-points down to +3°C can be achieved by using refrigeration dryers.
Refrigeration dryers are suitable for continuous operation and are available for all volume flow ranges. The pressure range usually extends to 16 bar, however special versions are also available for higher operating pressures.
Higher volume flows, operating pressures, larger connections or versions in stainless steel on request.
Robust housing with durable coating | Removable side panels
Fully integrated, completely thermally insulated heat exchangers | High degree of overload protection
Fine model range for optimized selection | Comprehensive standard equipment
Energy-saving commands | Electronic, level-controlled condensate drains
and many more …
Design and Function
Refrigeration dryers consist of two heat exchangers and a controlled refrigerant circuit.
The compressed air flowing in is pre-cooled in the first heat exchanger, the air-to-air heat exchanger 1, by the compressed air in counterflow direction, which is already cooled and flowing out.
In the second heat exchanger, the refrigerant-to-air heat exchanger 2, the compressed air is cooled down to its minimum temperature by the connected refrigerant circuit 3.
During the entire cooling process, moisture in the compressed air precipitates in the form of condensate which is centrally collected 4 and automatically discharged 5.
Finally, using the air-to-air heat exchanger 1, the compressed air is heated again by the warm, incoming compressed air in counterflow direction and thus brought to an undersaturated state. Provided that the compressed air temperature does not fall below the pressure dew-point, no more condensate can arise.