Description
Applications
The A-DRY desiccant adsorption dryer effectively separates water vapour from compressed air and lowers the dew point within the system. These dryers work particularly well in outdoor environments where freezing poses a risk.
Moreover, they excel in applications with stringent air dryness standards (PDP < +3°C). Industries such as food and beverage, pharmaceuticals, electronics, and chemicals rely on this technology for process air.
Among the various types, heatless regeneration adsorption dryers stand out for their simplicity, reliability, and cost-effectiveness.
The Heatless Absorption Compressed Air Dryer
The Compact A-DRY series dryer features an upper and lower control block and a controller with an LED display. It includes two desiccant-filled columns that operate alternately. In the first column, the system adsorbs moisture under pressure. However, while this occurs, the second column regenerates using a portion of pre-dried compressed air at ambient pressure.
When the first column reaches a designated saturation level, the system seamlessly switches to the second column. This transition is crucial, as it maintains the continuity of the adsorption process. It also ensures that there is no pressure drop at the dryer’s outlet. Consequently, the saturated desiccant regenerates by utilising a small volume of already dried compressed air. This air decompresses to an extremely dry state.
Furthermore, this highly dry decompressed air, known as “purge air,” flows in reverse through the saturated column. As a result, it effectively removes the adsorbed water molecules from the desiccant. It then releases them back into the ambient environment.
The new innovative design of A-DRY adsorption driers was created with our customers in mind. It allows for quick and dependable installation, usage, and maintenance. Our plug-and-play controller simplifies the installation process. Also, reducing the number of components and steps needed for assembly and disassembly ensures efficient and reliable servicing.
Operating cycles
Fixed Cycle Mode
The timer regulates the transition between columns. By employing high-quality adsorbents and advanced control techniques, we successfully extended the adsorption cycle to 10 minutes. This enhancement leads to fewer switchovers, decreased compressed air consumption, and reduced wear on critical components.
- Adsorption – 5 min
- Regeneration – 4 min
- Pressure build up – 1 min
Variable Cycle Mode (Switching Based on Dew Point)
Connecting a dew point sensor to the controller prolongs the duration of adsorption based on the sensor’s readings. Meanwhile, regeneration takes only 4 minutes to complete. Opting for the variable cycle mode when operating the dryer can significantly reduce average purge air consumption. It can reach exceptionally low levels, possibly even below 3%.
Standby Mode in A-DRY Series Heatless Adsorption Dryers
A feature of A-DRY series adsorption dryers allows them to receive a standby signal from the compressor or another compressed air source. In standby mode, air can freely flow through both towers from the inlet to the outlet of the adsorption dryer.
Simultaneously, the adsorption dryer controller is in standby mode and poised to return to normal operation upon receiving the appropriate signal. The standby signal is transmitted to the A-DRY adsorption dryer via a standby contact on the controller. It uses a connected switch for this purpose.
Easy Maintenance
Thanks to the innovative column design, you can replace the desiccant within minutes. Simply remove the entire column from the dryer by loosening four top nuts and taking out the side locking screws.This allows for refilling or replacing the column with a new one. Removing the column provides easy access to the check valve and purge nozzle. You do not have to disassemble the entire adsorption dryer.
Valves and membranes are situated beneath the lower control block, enabling quick and simple access for replacement.
National Filters do also offer alternative heatless regeneration dessicant dryers that are geared up for larger applications. They are ideal for flow rates between 110 to 1152Nm³/h
National Filters is here to assist you in assessing your business goals and selecting the ideal air compressor dryer solution to meet your specific needs and requirements.
For more information get in touch with your National Filters Representative. sales@nationalfilters.com.au
Call 1300 DRY AIR (1300 379 247)
