Emerson’s New Air Dryers Quadruple Maintenance Intervals in Rail Applications
Patented adsorbent drying material removes humidity from compressed air systems, reduces downtime, energy and life-cycle costs by extending maintenance schedules
HANOVER,
Germany (June 22, 2020) – Today Emerson introduced two new
compressed air dryers designed to significantly extend maintenance intervals,
minimize downtime and reduce energy costs in rail applications, including
brakes and door control. Typically, air dryers have an average service interval
of less than two years. The AVENTICSTM RDD (Roll-Up Dessicant Drying) and
RDDmin air dryers, have a service interval of eight years or 25,000 operating
hours. The new products feature a proprietary adsorption medium that removes
humidity from compressed air systems more efficiently, reducing energy usage
with a smaller envelope size and weight. The dryers’ shock- and
vibration-resistant design further enhances their reliability in tough rail
applications.
Humidity in compressed air can cause corrosion and ice
blockages at low temperatures, often disabling door systems or freezing valves
in the brake control circuit. Until now, conventional dryer systems relied on a
granular adsorption medium. The shocks and vibrations that occur during rail
operations cause channeling, air bypass and dust generation, which leads to a
significant loss in drying performance. Consequently, the dew point increases.
High water loading can cause a breakdown of the granulate bed resulting in
frequent material changes and a reduced service life.
The AVENTICS RDD air dryer features a new patented drying technology that has a significantly higher water adsorption capacity than other common air dryers.
To solve these problems, Emerson’s AVENTICS RDD technology
uses adsorbent crystals immobilized in a durable polymer support structure,
which is produced in a continuously embossed sheet and rolled up to tightly fit
into a barrel-type housing for high shock and vibration resistance. Unlike
com...
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To solve these problems, Emerson’s AVENTICS RDD technology
uses adsorbent crystals immobilized in a durable polymer support structure,
which is produced in a continuously embossed sheet and rolled up to tightly fit
into a barrel-type housing for high shock and vibration resistance. Unlike
competing products using desiccant beats, the AVENTICS dryers resist excessive
water loading and fully recover afterwards. This ensures constant performance
throughout the lifetime of the product and reduced life-cycle costs.
The RDD dryer is used for main air supplies on trains,
whereas the RDDmini is used for auxiliary air supply, to driver seats for
example. The efficient design means that the overall envelope size for both
dryers is half that of other dryers currently available on the market, allowing
for smaller envelope sizes and lower unit weight. The moisture uptake allows
for a much higher efficiency air consumption rate of less than 15%, which
reduces energy costs. Purge loss typically ranges above 20% for conventional
products.
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Published by Emerson Automation Solutions on Jul 13, 2020
Emerson Automation Solutions
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St. Louis, Missouri
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