Aircel HRS-L 2000 Heated Desiccant Air Dryer

The Aircel HRE and HRS-L Heated Blower Purge Desiccant Compressed Air Dryers utilize atmospheric air for regeneration of the desiccant bed significantly reducing or eliminating the use of compressed purged air for regeneration, resulting in an overall reduction in the cost of operation. No process air is used during this phase of the overall dryer cycle. Process air is only consumed during depressurization and repressurization of the off-line tower and, in the case of the HRE, during cool-down of the regenerated bed.

This amounts to an average 2% of the rated capacity of the dryer. The less purge air used, means more dry air passed along for utility use. Also, by reducing the purge air needed, it allows for a smaller compressor that requires less energy to run. The heated blower HRE/HRS-L dryers are the most efficient of all dryers to operate.

The HRE and HRS-L may have a higher initial cost than the heatless desiccant dryers, but they have substantially lower operating costs. This saves money and results in a lower lifetime cost of the dryer.

• 40°F Dew Point Standard (Consult Factory for -100°F)
• Ambient Air Temperature 38°F - 125°F
• Inlet Air Temperature 40°F - 110°F
• Operating Pressure: 60 - 150 psig
• 1 Year Standard Limited Warranty

Pricing includes mounted prefilter and afterfilter, ASME code stamped filter housing, differential pressure gauge, automatic drain valve and initial filter element. If you have questions on how to properly select a compressed air dryer, contact our knowledgeable customer service toll-free: 866-650-1937 or send us an email request.

Dimensions & Specifications

Pricing includes mounted prefilter and afterfilter, ASME code stamped filter housing, differential pressure gauge, automatic drain valve and initial filter element. If you have questions on how to properly select a compressed air dryer, contact our knowledgeable customer service toll-free: 866-650-1937 or send us an email request.

1. Capacity based on -40°F pdp, 100 psig inlet pressure, 100°F inlet temperature and 100°F ambient temperature according to CAGI ADF 200.

Standard Features:

• Purge air consumption reduced down to an average of 2% or less.
• Built-in energy management controls.
• Low pressure drop design for energy savings.
• Maximum desiccant volume for long life.
• High quality components for reliable service and long life.
• Unique HRE parallel flow to reduce or eliminate dew point and temperature spikes.
• Small footprint saves valuable floor space.
• Corrosion resistant finish.
• NEMA 4 electrical enclosures.
• Allen Bradley PLC control with panel view 300 display.
• Common alarm / pilot light.
• Failure to shift alarm.
• High performance butterfly valves.
• Stainless steel single body valves.
• Copper control air tubing.
• Water-cooled heat exchanger (HRS-L).

Optional Features for HRE and HRS-L:

• NEMA 4X (corrosive protection) electrical construction.
• NEMA 7 (explosion proof) electrical construction.
• -100°F pressure dew point.
• Low ambient temperature package.
• Dew point* monitor.
• Demand cycle control with dew point monitor.
• Pre-piped filters and by-pass valve packages.
• Visual moisture indicator.
• High output temperature alarm.
• Low ambient temperature alarm.

How The HRS-L Series Works

The HRS-L heated blower purge dryer incorporates a water-cooled heat exchanger which eliminates the need for purge air during the cool-down period. At the end of the heat cycle, a series of valves open or close creating a closed-loop between the air blower and vessel.

1. Wet compressed air, controlled by butterfly valves, enters the base of the on-line vessel (prefilter recommended).
2. As the compressed air passes through the desiccant bed, moisture is removed, lowering the dew point to -40º F.
3. Dry compressed air exits the top of the vessel, passes through a check valve and flows downstream to the use point (afterfilter recommended).
4. When the desiccant bed becomes saturated with moisture, it goes off-line and depressurizes to ambient through an angle-seat globe valve. A muffler attenuates the noise of depressurization.
5. After the off-line vessel has depressurized, a blower draws in ambient air for regeneration.
6. The ambient air is heated to 400º F, giving it the energy required to initiate and accomplish desorption, after which it passes through a check valve and enters the top of the regenerating vessel.
7. As the hot ambient air passes through the desiccant bed, water molecules are released from the surface of the desiccant and enter the airstream.
8. At the end of the heating phase the heater is turned off and regeneration air is directed through a water cooled heat exchange.
9. The blower circulates the cooled air back through the vessel.
10. As the cooled air passes through the desiccant bed, it picks up heat energy which is removed from the system via the water-cooled heat exchanger. The closed-loop cycle continues until the bed temperature is lowered to its operation point without the use of purge air.

Aircel HRS-L Zero Blower Purge Regenerative Air Dryer Series

Brochure (pdf)

Contact our customer service team by calling toll-free 866-650-1937 or email sales@ecompressedair.com for more information about the HRS-L dryer or for customized options and quotes.