COMPRESSED AIR
climates. Where high ambient temperatures and humidity do not allow for cooling with fresh air, the 12 HRS-L+ models solve the problem by using a water-cooled heat exchanger to cool the air stream heated by the desiccant. When this cooling water is no longer needed, a shut-off energy to be achieved. Based on the standard HRS+ range, this closed-loop, zero-purge design can achieve a pressure dew point as low as -70°C, making it ideal for worldwide use.
HELPING TO SET NEW STANDARDS FOR
EFFICIENCY AND RELIABILITY With all models now featuring Ultraconomy Dewpoint Control as standard, major energy savings can be achieved by the adsorption cycle time adjusting to current operating conditions, with regeneration only occurring once the desiccant has been fully utilised. ENERSAVE versions of the HRS+ and HRE+ are optionally available for even lower energy consumption. Safe, reliable performance is helped with a raft of new standard features, such as enhanced monitoring of compressed air system performance, a fan-cooled control box and the current pressure dewpoint always being visible on the controller display, enabling full controllability of the drying performance. Along with the pneumatically actuated main
valves that provide alarm message indications should a switch-over fail, there are four alarm contacts safeguarding the
condition-monitored condensate drains, plus another four customisable individual alarm inputs. Installation costs are reduced by powering those condensate drains from four 230V/AC power supply outputs within the dryer controller, rather than requiring an external power supply, while troubleshooting is cable marking. Durability is enhanced with a special painting process that safeguards against corrosion and temperatures as high as 200°C. The new range of available options now includes two levels of advanced heat insulation, differential pressure monitoring to predict with current data indicated on the HMI and long-term data available in graph form. Two new energy management programs are also optional and a ‘Weekend STOP’ mode enables faster decommissioning for short periods without the risk of pressure loss.
KNOWLEDGE IS POWER As a standard feature, the Ethernet Communication Interface is ready for Industry 4.0 and connectivity options. Additional
optional data communication modules and protocols, along with data links to user networks will expand the scope for even more (MultiMediaCard), ensures dryer uptime by providing back-up memory for the original dryer program in case of issues after reprogramming. “Of course, Donaldson will always be there to provide extensive application support in these circumstances, whether it’s for troubleshooting or helping with sizing before the unit has even carry out the commissioning, plus handle the maintenance, all thanks to our global presence “Compressed air is used in almost all industrial processes and even a 1°C reduction in its temperature is enough for condensation to begin, resulting in expensive damage and a reduction in quality of the end product. If your application calls for very low residual moisture for pressure dew points below 0°C, then you need an adsorption dryer. If you are looking for reliability, the lowest pressure dew point and the generation of Ultradryer should be top of your
Donaldson Filtration Systems
www.donaldson.com
FACTORY&HANDLINGSOLUTIONS | DECEMBER/JANUARY 2024/25 17
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