Our HLS Series heatless regenerative compressed air dryers are designed to protect pneumatic equipment and processes from the harmful and costly effects of compressed air moisture in low flow applications. The little brother of our highly recommended HL Series heatless regenerative compressed air dryer, our HLS Series air dryers provide a low -40° or -100° F dew point between 55 and 150 SCFM.
Since there is no external heat source, our HLS Series heatless regenerative compressed air dryers use a percentage of the dry air from one tower to regenerate the wet desiccant in the other tower. This makes the HLS Series compressed air dryer dependable and easy to monitor while requiring little maintenance. For these reasons, these compressed air dryers are ideal for protecting instruments and processes, such as critical point-of-use applications, laboratory use, paint spraying, and dust collectors.
The cycle monitor with LED and remote contact allows immediate notification of any disruption of the operation cycle. The controller also features a membrane panel housed in a NEMA 4X enclosure which clearly displays dryer operation with LED indicators for each step in the cycle sequence. This allows for a quick and easy way to monitor the performance of the compressed air dryer.
Price includes initial fill of desiccant.
• 55 through 150 SCFM
• Touchpad Controller
• -40° F or -100° F Pressure Dew Point
• No Purge Air Loss When Compressor Unloads
• Built In Cycle Monitor
Standard Equipment
• Status Indicator LEDs
• Activated Alumina Desiccant
• Control Air Filter
• Enamel exterior finish with primer on towers, piping and supports
• NEMA 4X control enclosure
• 15V/1PH/50-60HZ supply power
• Cycle monitor (FTS) LED and contact
• Touchpad Controller
• Dryer "Hold" Feature
• -40° F dew point, adjustable for -100° F dew point
• Permanently lubricated inlet transfer valve
• Purge exhaust muffler
• Removable stainless steel desiccant diffusers
• Tower pressure gauges
• Welded steel vessels (models 120 and 150 are to ASME code)
Optional Equipment
• 230V/1PH/50-60HZ supply power
• Mounted Filters
• Mounted Filters with three-valve bypass
• Digital dew point meter with alarm contact and recorder output
| Model | A | B | C | D | E | F | Inlet / Outlet | Desiccant1
Weight
per Tower | Total Weight |
| HLS-55 | 65 | 19 | 20 | 6 | 63 | 4 | 1/2" NPT | 31 | 230 |
| HLS-80 | 86 | 19 | 20 | 6 | 84 | 7 | 1" NPT | 44 | 280 |
| HLS-120 | 76 | 25 | 20 | 6 | 75 | 8 | 1" NPT | 68 | 385 |
1 For total desiccant weight, multiply by two.
• Due to continuous improvement, dimensions, and specifications may change without notice.
• Request certified drawing for pre-piping.
Maximum Capacities - SCFM for -40° F Dew Point
| Model | 60
PSIG | 75
PSIG | 90
PSIG | 100
PSIG | 125
PSIG | 150
PSIG |
| HLS-55 | 36 | 43 | 50 | 55 | 61 | 66 |
| HLS-80 | 52 | 63 | 73 | 80 | 88 | 96 |
| HLS-120 | 78 | 94 | 110 | 120 | 132 | 144 |
| HLS-150 | 98 | 117 | 137 | 150 | 166 | 180 |
* Maximum capacities based on 100 PSIG, 100° F inlet and 100% RH.
Correction Factors
Multiply maximum capacity by .9 for 110° F, .8 for 120° F, .8 for -100° F dew point (4 minute NEMA cycle)
Operating
Conditions | Minimum | Maximum |
| Pressure | 60 PSIG | 150 PSIG |
| Inlet Air Temp. | 40° F | 120° F |
| Ambient Air Temp. | 40° F | 120° F |
Recommended Air Filters
| Model | Pre-Filter | After-Filter |
| HLS-55 | F200-55-1/2-C-AD | F200-55-1/2-RB |
| HLS-80 | F200-85-3/4-C-AD | F200-85-3/4-RB |
| HLS-120 | F200-150-1-C-AD | F200-150-1-RB |
| HLS-150 | F200-150-1-C-AD | F200-150-1-RB |
Lubricated Compressors - Dryer must be equipped with proper Van Air pre-filters. These filters must be drained and maintained as specified. Desiccant beds should be checked periodically and replaced if contamination has occured. Failure to do so may result in hazardous operating conditions and will void the warranty. An after-filter should be installed downstream of the dryer to prevent desiccant particle migration.
Non-lubricated Compressors - A particulate or coalescing pre-filter is recommended to prevent pipe scale and dust from fouling the dryer. An after-filter should be installed downstream of the dryer to prevent desiccant particle migration.