Hankison Air Dryers: Refrigerated and Desiccant Options for Industrial Facilities
If you’re comparing Hankison air dryers for an industrial facility, the first question is usually simple: do you need to remove normal bulk moisture, or do you need much drier air for a process that can’t tolerate water vapor and carryover? That answer drives the choice between a refrigerated dryer and a desiccant dryer.
In a lot of Tennessee plants, machine shops, and manufacturing facilities, the dryer gets overlooked until water shows up in the lines, corrosion starts in the piping, or a sensitive air tool or process starts acting up. By then, the dryer may be undersized, the wrong type for the application, or fighting a system problem that goes beyond the dryer itself. The right Hankison dryer is the one that matches the facility’s air quality needs, operating conditions, and demand pattern.
Gordon Air Compressor works with industrial customers across Tennessee to sort through those choices without overbuying equipment or guessing at the spec sheet. Here’s how to think about Hankison refrigerated and desiccant air dryers in practical terms.
Start with the air quality the facility actually needs
Not every compressed air system needs the driest air available. A general production line, maintenance air, or a standard plant header often does fine with a refrigerated dryer if the goal is to remove bulk liquid water and keep the distribution system dry enough for normal industrial use. A refrigerated dryer is often the practical choice when the air system is supporting general manufacturing, assembly, packaging, or shop air where extreme dew point levels aren’t required.
Desiccant dryers are a different story. They’re used when the facility needs much lower moisture levels than a refrigerated unit can provide. That can matter for instrumentation, outdoor piping exposed to winter conditions, certain paint or finishing operations, or processes where moisture is a problem for product quality or equipment life. If the air is going to a sensitive application, the dryer decision should be made around the required dew point, not around what a previous installation happened to use.
That’s the main point with Hankison air dryers: don’t start by asking which dryer is “better.” Start by asking what the process needs, what the air system is really doing, and what conditions the dryer will see every day.
Refrigerated Hankison dryers: the common fit for general plant air
Refrigerated air dryers remove moisture by cooling compressed air so water condenses out and can be drained away. For many industrial facilities, that’s enough. If the air is going to tools, cylinders, production equipment, or general plant distribution, a refrigerated dryer often makes sense because it’s straightforward, familiar to maintenance teams, and usually easier to live with than a desiccant unit.
Where refrigerated dryers usually fit well
General manufacturing air systems
Machine shops with standard compressed air demands
Assembly and packaging lines
Facilities that need dry air, but not ultra-dry air
Plants that want lower maintenance than a desiccant system typically requires
In a Tennessee facility, refrigerated dryers are often the first line of defense against summer humidity and water carryover. Hot, humid weather can load a system heavily, especially if the compressor room pulls in warm ambient air or the system sees a lot of demand swing during the day. If the dryer is undersized or the plant is pushing more CFM than the system was built for, moisture can show up downstream even if the compressor itself is running fine.
What to look at before choosing one
A refrigerated dryer should be matched to the actual operating conditions, not just the compressor nameplate. That includes inlet air temperature, ambient temperature in the compressor room, actual demand, pressure, and the amount of load variation in the system. A dryer that looks fine on paper can struggle if the air coming into it is hotter than expected or if the plant expands production and increases demand without revisiting the dryer size.
It’s also worth looking at the rest of the treatment train. Dirty filters, excessive pressure drop, poor condensate drainage, or a receiver tank that’s too small can all make a good dryer look bad. Sometimes a plant blames the dryer when the real issue is elsewhere in the system.
Desiccant Hankison dryers: for lower dew point needs
Desiccant dryers use an adsorbent material to pull moisture out of compressed air. They’re used when a refrigerated dryer won’t get the air dry enough for the application. That usually means more demanding air quality requirements, lower ambient temperature concerns, or processes where even small amounts of moisture can create problems.
Compared with refrigerated units, desiccant dryers are generally chosen for more specific applications. If the facility needs to keep moisture out of control valves, lab air, instrumentation, or a process exposed to cold weather, the added dryness can be the right call. But that extra dryness comes with tradeoffs in cost, maintenance, purge air use, and system design. It’s not the automatic answer for every plant.
Where desiccant dryers make sense
Instrumentation air
Facilities with very low dew point requirements
Outdoor air systems exposed to freezing conditions
Applications sensitive to moisture contamination
Plants with air quality requirements beyond standard industrial use
For buyers evaluating Hankison air dryers, this is where the conversation needs to be specific. If the only problem is water in the header during summer, a desiccant dryer may be more than the facility needs. If the problem is moisture-related shutdowns in a process that can’t tolerate water vapor, a refrigerated unit may not go far enough. The right answer depends on the actual use case.
How to compare refrigerated and desiccant options
Plant managers and engineers usually get the best result when they compare dryers based on system needs, not just upfront cost. The lower purchase price of a refrigerated dryer can be attractive, but if the air quality requirement is tighter than that dryer can handle, the savings disappear quickly. On the other hand, buying a desiccant unit for general plant air can add complexity and ongoing operating cost without improving the process.
The main factors that matter
Required dew point: The biggest deciding factor. If the process needs very dry air, that points toward desiccant.
Demand profile: A steady system is easier for most dryers to handle than a highly cyclical one.
Inlet temperature and ambient conditions: Hot compressor rooms and Tennessee summer humidity can load a dryer harder than expected.
Pressure drop: Too much restriction across dryers and filters can affect downstream pressure and plant performance.
Maintenance expectations: Desiccant systems usually ask more from the maintenance team than refrigerated systems.
Energy and operating cost: The purchase price is only part of the story.
If a facility is trying to decide between dryer types, it helps to look at the whole compressed air system: compressor capacity, receiver storage, piping layout, filter condition, drain performance, and actual plant demand. A plant can sometimes “need” a bigger dryer only because it has too little storage or too much pressure loss in the distribution system.
Common mistakes when selecting a dryer
One of the most common mistakes is assuming the compressor room pressure tells the whole story. A compressor may hold pressure at the machine, while equipment farther downstream sees low pressure because of undersized piping, clogged filters, leaking connections, or a dryer that’s adding too much drop. In that situation, a larger compressor might not fix the issue at all.
Another problem is installing a dryer based on old system conditions. A facility may have added production equipment, expanded shifts, or changed the demand profile without revisiting compressed air treatment. The dryer that worked fine three years ago may now be undersized for current conditions. That shows up as wet air, cycling issues, or unstable performance during peak demand.
Maintenance teams also run into trouble when condensate management is ignored. If drains aren’t working properly, moisture can collect where it shouldn’t. That can lead people to blame the dryer when the real issue is a drain failure or poor system layout.
A realistic Tennessee example
Think about a manufacturing plant in Middle Tennessee that adds new production equipment and doesn’t recalculate compressed air demand. The compressor still reaches target pressure in the compressor room, but operators start seeing moisture and pressure problems farther out on the floor. The first reaction is often to raise system pressure, which only masks the problem and can make leakage worse.
In a case like that, the right answer might be a dryer review, not just a compressor upgrade. If the plant is running a refrigerated dryer that’s too small for the new load, the dryer may be part of the issue. If the air quality requirement is tighter for the new equipment, the facility may need to evaluate whether a desiccant dryer is more appropriate. The point is to match the dryer to the actual system, not the old system.
What Tennessee buyers should ask before requesting a quote
If you’re comparing Hankison air dryers through Gordon Air Compressor, it helps to have a few details ready. That makes it easier to narrow the options and avoid buying the wrong piece of equipment.
What type of equipment is using the air?
What is the actual CFM demand, including peak demand?
What pressure does the system need at the point of use?
What dew point or air dryness level is required?
Is the facility seeing water, corrosion, or other moisture-related issues now?
What are the ambient conditions in the compressor room?
Are filters, drains, receivers, and piping in good shape?
Has the plant expanded or changed production recently?
Those questions help separate a true dryer problem from a system problem. They also help avoid the common mistake of buying a larger dryer when the issue is really pressure drop, leaks, or poor condensate control.
Bottom Line
Hankison air dryers come down to fit. Refrigerated dryers are usually the right answer for general plant air when the goal is to remove moisture and keep the system dry enough for normal industrial use. Desiccant dryers are the better choice when the application needs much drier air or has tighter air-quality requirements. The best selection depends on actual demand, inlet conditions, ambient temperature, dew point needs, pressure drop, and how the rest of the compressed air system is built.
If your Tennessee facility is trying to compare dryer options, or if you’re dealing with moisture problems that haven’t been solved by maintenance alone, Gordon Air Compressor can help evaluate the system and the equipment options available through our team.
Gordon Air Compressor
706 Scott Street
Memphis, TN 38112
Sales and Service: 901-327-1327
Emergency Service: 901-482-5925
