With proper maintenance of pre-filters, activated alumina desiccant should last up to 5 years in heatless dryers. For heat regenerated dryers the desiccant should last 2 to 3 years. Desiccant can be visually inspected to look for discoloration and oil contamination.
Heatless desiccant dryers are ideal for delivering instrument quality air for critical applications. Membrane air dryers use specially formulated membrane microtubes that are selectively permeable to water vapor. The microtubes provide an excellent medium for producing dry air from standard compressed air.
Add on, what does a desiccant dryer do? Desiccant dryers lower the dewpoint of compressed air by adsorbing water vapor onto the surface of a desiccant. The process of adsorption begins as the water vapor, which is more highly concentrated in the compressed air stream, moves into an area of lower water vapor concentration in the pores of the desiccant.
One way or another, how do I change the desiccant in my air dryer?
Replacement of desiccant beads can be a labor-intensive job:
Turn dryer off and allow to cool down.
Tops must be removed from both towers.
All desiccant must be scooped or shoveled out of the bed.
Vacuum dust from inside the towers.
Check the manufacturers recommendation for desiccant type.
What are the most common desiccant materials used in dryers?
The most common desiccant is silica, a nontoxic, water insoluble white solid used in a number of industries. Some other desiccants include activated charcoal, calcium chloride, calcium sulfate and molecular sieves.
BESTSELLER NO. 1 in 2021
In LINE Desiccant AIR Dryer for Compressed AIR Great for Pneumatic Tools Spray Booth Plasma Cutter, with Desiccant beads (3/8" NPT)
BESTSELLER NO. 2 in 2021
3 STAGE, HEAVY DUTY INDUSTRIAL GRADE FILTER REGULATOR COALESCING DESICCANT DRYER SYSTEM FOR COMPRESSED AIR LINES, METAL BOWLS, GREAT FOR PAINT SPRAY AND PLASMA CUTTER (3/4" NPT, MANUAL DRAIN)
3/4" NPT, INDUSTRIAL RATED 3 STAGE COMBO WATER FILTER/ PRESSURE REGULATOR/ COALESCING FILTER/ DESICCANT DRYER SYSTEM, WITH WALL MOUNTING BRACKET AND MANUAL DRAIN STAGE 1
225 PSI MAX INPUT. THIS UNIT WILL REGULATOR YOUR INCOMING AND OUTGOING AIR PRESSURE WHILE REMOVING MOISTURE WATER, MOISTURE VAPOR AND OIL FROM YOUR COMPRESSED AIR LINES, THEN FINALLY DRYING OUT THE SUPER CLEAN AIR WITH AN IN-LINE DESICCANT AIR DRYER
STAGE 1: WATER TRAP FILTER / PRESSURE REGULATOR. EQUIPPED WITH 5 MICRON ELEMENT TO REMOVE 95% OF THE INITIAL MOISTURE AND DEBRIS FROM YOUR COMPRESSED AIR LINE. REGULATOR ADJUSTS PRESSURE FROM 7 TO 215 PSI. 5oz METAL BOWL WITH VISIBLE SIGHT GLASS.
STAGE 2: COALESCING FILTER ALSO KNOWN AS OIL REMOVING FILTER ARMED WITH A 0.01 MICRON ELEMENT THAT REMOVES 99.98% OF MOISTURE, MOISTURE VAPOR AND OIL THAT MADE ITS WAY PAST YOUR STAGE 1 FILTER. 5oz METAL BOWL WITH VISIBLE SIGHT GLASS. RED INDICATOR POPS UP WHEN TIME FOR FILTER CHANGE.
STAGE 3: DESICCANT AIR DRYER, DRIES OUT YOUR SUPER CLEAN AIR BEFORE GOING DOWNSTREAM TO YOUR AIR TOOLS. USES 5oz DESICCANT BEADS IN THE BOWL. BEADS TURN FROM BLUE TO PINK WHEN TIME TO CHANGE. COMES WITH 2 BAGS OF DESICCANT BEADS.
BESTSELLER NO. 3 in 2021
Campbell Hausfeld Air Cleaner, Air Dryer for Air Tools (PA208503AV)
Oil-removal filter traps 99.9% of all oil aerosols and a desiccant system removes water vapor, protecting air tools
The desiccant changes color when it needs to be changed or recharged, providing an easily visible reminder
Item Package Dimension: 12.3" L x 7.1" W x 3.9" H
Item Package Weight: 4.9 lb
BESTSELLER NO. 4 in 2021
ATD Tools 7888 5-Stage Desiccant Air Drying System
Stage 1 - 5 micron particle filter
Stage 2 - .01 micron oil removing filter
Stage 3 - 1 gallon desiccant dryer metal bowl with sight glass
Stage 4 - 3 micron absolute filter
Stage 5 -precision regulator with gauge
BESTSELLER NO. 5 in 2021
Plews 56-081 Desiccant Dryer
Amflo compact desiccant dryers have been engineered to deliver extremely dry compressed air to protect pneumatically operated equipment from the adverse affects of moisture
A regular filter and an oil removal filter should be used as a prefiltering system immediately ahead of the desiccant dryer - a regular filter may be required after the dryer to remove desiccant dust
Features an aluminum main body, metal bowl with sight glass, 70 Micron porous polypropylene internal inlet filter, 40 Micron sintered bronze internal outlet filter, 300 psi Max pressure
1/2 inch port size, 1 qt capacity Steel bowl is rated at 250 psi at 120 degrees F; for compressed air systems only - not for use with fluids
When desiccant bead has changed Color from dark Blue to Pink the entire desiccant must be replaced or regenerated by placing it in a drying oven at 275 degree F until it turns dark Blue again
BESTSELLER NO. 6 in 2021
3/8" Compressed air in line filter & desiccant air dryer combination SPRAY GUN EQUIPEMENT PAINT BOOTH COMPRESSOR
3/8" Desiccant Filter / Dryer Combo Inline Compressed Air System Dessicant
BESTSELLER NO. 7 in 2021
3 STAGE, INDUSTRIAL GRADE IN-LINE COALESCING FILTER & DESICCANT AIR DRYER COMBINATION WITH METAL BOWLS FOR SPRAY GUN EQUIPMENT PAINT BOOTH COMPRESSOR, PLASMA CUTTER (1/2" AUTO DRAIN)
3 STAGE, INDUSTRIAL GRADE COALESCING FILTER PLUS DESICCANT AIR DRYER, IN-LINE TYPE FOR COMPRESSED AIR LINES, PERFECT FOR SPRAY OR PLASMA CUTTER APPLICATIONS.
2 BAGS OF DESICCANT BEADS INCLUDED, BEADS GO FROM BLUE TO PINK WHEN TIME TO CHANGE
STAGE 1: PARTICULATE FILTER / WATER TRAP REMOVES 95% OF MOISTURE AND DEBRIS FROM COMPRESSED AIR LINES. 5u MICRON ELEMENT
STAGE 2: COALESCING FILTER / OIL REMOVING FILTER REMOVES 99.98% OF MOISTURE, OIL AND CONTAMINANTS FROM YOUR COMPRESSED AIR LINES
STAGE 3: DESICCANT DRYER TAKES UP TO 5oz OF DESICCANT BEADS TO THOROUGHLY DRY OUR YOUR COMPRESSED AIR LINES BEFORE THE AIR GETS TO YOUR PNEUMATIC TOOLS
BESTSELLER NO. 8 in 2021
1/2" COMPRESSED AIR PARTICULATE FILTER WATER TRAP / PRESSURE REGULATOR / DESICCANT AIR DRYER / COALESCING FILTER FOR COMPRESSED AIR SYSTEMS GREAT FOR PLASMA CUTTER
New 1/2" Particulate Filter & Pressure Regulator / Water Trap
Compressed Air Line Coalescing Filter and desiccant dryer combo
1/2" FEMALE NPT INLET X 1/2" FEMALE NPT OUTLET
THREE Stage unit has added water seperator pre filter to remove larger debris and moisture
BESTSELLER NO. 9 in 2021
HEAVY DUTY INDUSTRIAL GRADE IN LINE DESICCANT AIR DRYER FOR COMPRESSED AIR COMPRESSORS, WITH METAL BOWL, SIGHT GLASS, WALL BRACKET AND 2 BAGS DESICCANT BEADS (3/4" NPT)
3/4" NPT, HEAVY DUTY INDUSTRIAL IN-LINE DESICCANT AIR DRYER WITH METAL BOWL
THIS UNIT WILL REMOVE MOISTURE FROM YOUR COMPRESSED AIR LINES.
Heatless air dryers are pressure swing adsorbers designed to retain the heat of adsorption within the desiccant beds during the drying process. The stored heat of adsorption is consumed during the regeneration process to remove moisture from the desiccant to provide continuous service.
Air dryers are essential for air compressors. They keep compressors free of moisture, and prevent condensate and rust problems from occurring. ... Accumulation of this moisture, over time, can cause serious damage to the compressor. It can corrode valves, pipes and even machinery controls.
If you wanted a properly sized dryer from one example supplier, you should add 51% for the high inlet temperature, about 5% for the lower pressure and another 16% for high ambient temperatures. This would result in a dryer rated at about 500 x 1.51 x 1.05 x 1.16 = 920 cfm.
Place the thermometer into the glass containing the desiccant and pour the water into the glass. Stir the mixture and observe the increase in temperature of the mixture; continually stirring with the thermometer and recording its peak temperature. This should occur in about 10 to 20 seconds.
Another indicator that desiccant is going bad is quicker than normal loading on the particulate filter downstream. As the desiccant deteriorates it creates more dust to be blown downstream which is then captured in the particulate filter. Another check is the differential pressure across the dryer.
Oven re-drying method (preferred): Deposit 2 pounds (1 quart) of silica gel or molecular sieve in Pyrex baking dish; spread an even layer in the dish. Program the oven at 275°F. Leave the oven door slightly ajar and bake for about 1 ½ hours.
Carpet Treatment—Baking soda is a gentle desiccant, meaning it absorbs moisture from the environment, and since carpet tends to behave like the big sponge everyone walks across in your house, baking soda makes an ideal carpet treatment.
The most common desiccant is silica, an otherwise inert, nontoxic, water-insoluble white solid. Tens of thousands of tons are produced annually for this purpose. Other common desiccants include activated charcoal, calcium sulfate, calcium chloride, and molecular sieves (typically, zeolites).
Desiccators in Action A desiccant, or drying material, is usually added to the desiccator to absorb water vapor whenever the desiccator is opened. Calcium chloride (a salt) and silica gel (a non-reactive solid) are two typical desiccants that are used routinely.
It is important to realize that for a basic heatless air dryer, the purge flow is related to the rating of the air dryer, and is not the percentage of the air flowing through it. For a 1000 cfm heatless air dryer, the 15 to 20 percent purge air loss would be between 150 and 200 cfm.
To size the desiccant air dryer to match this compressor, we need to calculate 65% of the total CFM, in this case, 20. The max output is no more than 13 CFM or 65% of the total CFM of 20. The desiccant air dryer only needs to work at 13 CFM to fit the compressor and match the total dry air needed. Why It Matters!