Adsorption Dryers

Safewell supplies adsorption dryers from the Donaldson range including Ultrapac 2000, Oilfreepac and HED / ALD / MSD Heatless Adsorption Dryers. Adsorption dryers are used to remove water vapour from compressed air used in applications where the air has to be very dry to prevent bacterial growth, corrosion and disruption to production processes involving air actuated equipment e.g. valves or instrumentation.

These type of dryers contain desiccant, a media used to adsorb water from air. Air is passed through the media and the water vapour is retained by the desiccant. For continuous long term operation it is necessary to regenerate the desiccant media when is becomes wetted to ensure that its drying efficiency is sustained.

Desiccant dryers are typically manufactured with duty and standby desiccant chambers. The duty chamber is used to provide a flow of dry air while the standby chamber is being regenerated. A small stream of dry air from the duty chamber flows in reverse through the standby chamber to exhaust drying the wetted desiccant. Following regeneration the chambers swap duty and the other chamber is then regenerated. Regeneration control can be electronically or pneumatically controlled.

The performance and efficiency of desiccant dryers is validated by measuring the pressure dewpoint of the treated air. The pressure dewpoint indicates the temperature when condensation of water vapour present in the compressed air supply will occur. Typically adsorption dryers will produce a dewpoint of -20 to -70 Deg C providing very dry air at normal ambient temperatures.

It has been demonstrated that bacteria will survive in compressed air down to a pressure dewpoint of -26 DegC. A desiccant dryer is therefore essential when drying compressed air used in critical applications involving food and pharmaceutical production or applications where the air is used for respiratory protection or medical therapy.

Ultrapac 2000

Ultrapac 2000 heatless adsorption dryers come in two main ranges, the Mini version which covers volume flow rates from 5 to 25 m3 / Hr (1 bar, 20 Deg C) and the Midi version which covers flow rates from 35 to 100 m3 / Hr (1 bar, 20 Deg C). The Ultrapac 2000 is a complete purification package including the dryer, pre-filter, after-filter and condensate drain in a compact space saving design offering a range of benefits including energy efficiency and ease of maintenance. The desiccant is contained in easy to replace cartridges. The dryer will provide a pressure dewpoint of -40Deg C at 100% load. Operating pressure is up to 16 bar (g)

Download information for the Mini and Midi range

Ultrapac HED / ALD / MSD

This range of dryers offers a complete purification package including heatless adsorption dryer with pre-filter, after-filter and electronic condensate drain. The range covers flow rates from 5 to 1000 m3 / Hr (1 bar, 20 Deg C).ALD/HED/MSD dryers provide dewpoints from -20 Deg C to -70 Deg C. Operating pressure is up to 16 bar (g)

Download information for the HED / ALD / MSD range

High Pressure Adsorption Dryers

For processes where the air pressure is greater than 16 bar (g) we can supply a range of safe and efficient heatless regenerating dryers suitable for operation at max pressures of 25, 40 100, 250 and 400 bar (g). Volume flow rates (1 bar, 20 Deg C) range from 40 to 1130 m3 / Hr for the 25 bar (g) unit, 50 to 1200 m3 / Hr for the 40 bar (g) unit, 55 to 655 m3 / Hr for the 100 bar (g) unit, 90 to 1050 m3 / Hr for the 250 bar (g) unit and 115 to 870 m3 / Hr for the 400 bar (g) unit. The dryer includes pre and after filter.

Download information for the 25 and 40 bar (g)  dryers and 100, 250 and 400 bar (g) units