D2 - Desiccant Air Dryer

The D Series is a single tower desiccant air dryer designed for point-of-use and intermittent flow applications.   The wet compressed air enters at the inlet, is first separated due to the off-set inlet creating centrifugal separation to trap water droplets, and subsequently passes around a polypropylene coalescer element, felt pads, and stainless-steel grids to remove solid particulates.  The air flows upward through a sewed filtration desiccant bag that acts as a sponge to absorb moisture.  Finally, the air flows again through the second stage of filtration to eliminate any desiccant dust.  This 3-stage system efficiently provides separation, filtration, and drying. It is time to replace the cartridge when the Moisture Gauge indicates saturation.  The replacement is fast and mess-free, thanks to the US stainless-steel clamp.  The rust-free powder-coated aluminum housing is made in Canada and includes built-in brackets.

1. How long does the cartridge last?
Typically we recommend changing the cartridge at least once to twice every year (or every 2,000 hrs) when used for point-of-use applications with an intermittent flow.

2. When do I know when to change the cartridge?
Use our moisture indicator HGT-1/4 and replace the cartridge when the R.H. exceeds 80%.

3. Can I regenerate the desiccant?
We highly recommend replacing the desiccant with a fresh cartridge for optimal performance.  However, you may dry the desiccant by emptying the bag and leaving the activated alumina in an oven at 275 F for 4 hours (approximately).  Let the desiccant cool down before refilling the bag.  Use a commercial stapler to close the bag.

4. How can I extend the life of the cartridge?
We recommend draining the tower daily by opening the ball valve or using our automatic timer drain TD-1/4.  When there are bulk liquids in the compressed air, a water separator FSD Series installed upstream of the dryer will knock water and prevent the flooding of the cartridge.

5. Can I oversize my air dryer?
Yes, oversizing the air dryer will increase the time in between maintenance.