Aircel HRS-L Series

Dimensions & Specifications

Search below based on your specific needs and click on a model to order, view pricing, or download product information. 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. Pricing includes mounted prefilter and afterfilter, ASME code stamped filter housing, differential pressure gauge, automatic drain valve and initial filter element.

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 Voltage: 460V/60 Hz/3Ph

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.

Use our Drying Sizing Tool below to find the dryer you need based on your system specifications.

How to Size a HRS-L

To Size the Dryer Capacity for Actual Conditions

Adjusted Capacity = scfm x C1 x C2

To calculate the capacity of a given dryer based on non-standard operating conditions, multiply the standard capacity by the appropriate correction factor(s).

EXAMPLE: Dryer Model: HRS-L-600
Standard Capacity: 600 scfm
Actual Operating Conditions: 80°F ambient temperature: C1 = 1.15
90 psig system pressure: C2 = 0.91
Adjusted Capacity = 600 scfm x 1.15 x 0.91 = 628 scfm

To Select the Dryer Model for Actual Conditions

Adjusted Capacity = scfm/C1/C2

To choose a dryer based on a given flow at non-standard operating conditions, divide the given flow by the appropriate correction factor(s).

EXAMPLE: Given Flow: 600 scfm
Actual Operating Conditions: 80°F ambient temperature: C1 = 1.15
130 psig system pressure: C2 = 1.27
Adjusted Capacity = 600 scfm / 1.15 / 1.27 = 410 scfm

Selected Dryer Model: HRS-L-600

Capacity Correction Factors

The Compressed Air and Gas Institute (CAGI) has developed standards to protect users of compressed air & gas equipment ADF 200 is the current standard for desiccant compressed air dryers. ADF 200 specifies the dryers performance to be rated at -40°F pressure dew point, 100°F inlet temperature, 100°F ambient temperature, and 100 psig system pressure. To adjust the dryer capacity from these "CAGI conditions" to your specific application, please use the correction factors below for differing inlet air temperatures (C1) and system pressures (C2).

Regenerative compressed air dryers use desiccant to adsorb water vapor from the compressed airstream. In the twin tower design one tower dries the air from the compressor while the desiccant in the other tower is being regenerated to provide continuous operation. These dryers are typically referred to as "heatless" or "heated". Heatless dryers do not use any source of heat for regeneration other than the heat given off during the drying phase. This is known as the "Heat of Adsorption". Heated dryers, on the other hand, utilize an external heat source for regeneration and require little or no process air.

The Aircel HRS-L Series Dryers (600 - 10,000 scfm) utilize externally heated atmospheric air for regeneration of the desiccant bed. This eliminates the use of compressed purge air for regeneration resulting in an overall reduction in the cost of operation. In the HRS-L the cool-down of the regenerated bed is assisted by a water cooled heat exchanger that further reduces compressed air usage. The result, only a small fraction of process air is consumed during depressurization of the offline tower. This amounts to an average process air use of < .05% of the rated capacity of the dryer.

Standard Features:

• Pricing includes mounted prefilter and afterfilter, ASME code stamped filter housing, differential pressure gauge, automatic drain valve and initial filter element.
• 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.