Product category
Air treatment
Dryers and filtration that take the water, oil and dirt out of your compressed air. Pick what you are looking for.
The everyday dryer
Refrigerated dryers
Chills the compressed air so the water condenses and drains away, the same way an air conditioner pulls humidity out of a room.
- General plant air and indoor piping
- Tools, cylinders and pneumatic controls
- Cycling designs for varying loads, non-cycling for steady ones
- High inlet temperature and high-pressure versions available
When dry has to mean dry
Desiccant dryers
Passes the air through twin towers of desiccant that pull the moisture out. One tower dries while the other regenerates, then they swap.
- Instrument and control air
- Outdoor lines that see a freeze
- Paint, pharma, food and process air
- Heatless, heated purge and blower purge designs
Dry air with no power
Membrane dryers
Bundles of hollow fibers let water vapor pass through the fiber wall while the dry air carries on down the line. No refrigerant, no desiccant, no electricity.
- Point-of-use drying right at the equipment
- Remote sites and hazardous areas
- Small flows, labs and analyzers
- No moving parts, close to silent
Take out what the dryer can't
Compressed air filtration
Removes solid particles, water and oil aerosols, and oil vapor. Filters sit before the dryer to protect it and after it to polish the air for your process.
- Protecting dryers, valves and downstream equipment
- Meeting an ISO 8573-1 air quality class
- Threaded and flanged housings for any pipe size
- Mist eliminators for large flows at low pressure drop
Why it matters
Air leaves the compressor hot, wet and dirty.
Compressing air concentrates the water vapor, oil and particles that were already in it. Left alone, that ends up as rust in your piping, water in your tools and rejects in your product. Treatment is what turns it into usable air.
Start
Compressor
Discharge air is hot, saturated with water and carries oil and particles.
Clean
Pre-filter
Knocks out bulk water, oil aerosols and dirt so the dryer can do its job.
Dry
Dryer
Refrigerated, desiccant or membrane, chosen by how dry the air has to be.
Polish
After-filter
Catches desiccant dust and oil vapor before the air reaches your process.
Result
Your process
Clean, dry air at the quality class your equipment and product need.
Which dryer do I need
Start with how dry
The required dew point usually makes the decision. Filtration goes with all three.
| Dryer | Typical pressure dew point | Power | Choose it when | Cost to run |
|---|---|---|---|---|
| Refrigerated | 35 to 39°F | Electric | Air stays indoors and above freezing, and the process does not need bone-dry air. | ▬▬▬ Lowest |
| Desiccant | -40°F and lower | Compressed air purge, heater or blower, by design | Instrument air, outdoor lines, or any process where moisture ruins product. | ▬▬▬ Highest, varies by type |
| Membrane | Set by model and sweep air | None | Small flows at the point of use, or where there is no power and no one to maintain it. | ▬▬▬ Sweep air only |
General guidance. A HOLT specialist confirms the dryer, the filtration stages and the sizing for your flow, pressure, inlet temperature and air quality class.
Contaminant removal systems
Sullair dryers and filters
Refrigerated and regenerative (desiccant) compressed air dryers, filters and mist eliminators from Sullair.
Refrigerated compressed air dryers
Designed to deliver a dew point between 355°F to 39°F
RN Models are available in capacities from 5 to 325 SCFM
RD Models are available in capacities from 400 to 6000 SCFM.
RC Models are Cycling Thermal Mass Dryers from 150 to 3000 SCFM.
RH Models are for high temperatures available with 200ºF maximum inlet temperature 15 to 100 SCFM.
Regenerative (desiccant) compressed air dryers
Made for operations that require an extremely low dew point to -40°F (-100ºF optional).
DMD: Desiccant Modular Dryers are completely automatic compact dryers that range in capacity from 3 to 240 SCFM.
DHL: Desiccant Heatless Dryers range in capacity from 80 to 5000 SCFM.
DEX: Desiccant Externally Heated Dryer utilize an external heater to assist in the regeneration process, they range in capacities from 200 to 3500 SCFM.
DBP: Desiccant Blower purge Dryers utilize an externally heated blower to purge further decrease purge losses, they range in capacities from 500 to 10,000 SCFM.
Compressed Air Filtration
Filters for industrial air compressors
Available from 13 to 16,500 SCFM, 15 to 725 PSI, 35°F and 250°F, and ISO 8573.1 quality classes for instrumentation, food processing and pharmaceutical production.
Mist Eliminator Specifications
Mist eliminators for industrial air compressors
The answer to the ever-increasing industry demands for clean, high-quality compressed air and efficient removal of oil-mist carryover from piston or oil-flooded rotary compressors.
Our products are in stock and ready to ship!
More than the equipment
Sized, installed and supported
Selection and sizing
AirMaster+ and CAGI certified specialists match the equipment to your demand, not the other way around.
Installation and start-up
Our team handles installation, piping and commissioning so the system runs right from day one.
Parts and service, 24/7
Four Texas branches, genuine parts and factory-trained technicians behind everything we sell.
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