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.
How often should desiccant be changed?
once every three years
We recommend that a desiccant be replaced once every three years for open-cycle systems and once every two years for closed-cycle systems. A desiccant may degrade more quickly depending on the environment where it is used. Dew point temperatures offer a good indication for when to replace your desiccant.
When should I replace my air dryer desiccant?
Replacement of desiccant beads is recommended every two years….It’s time to replace desiccant beads when:
- The dew point of the process air won’t attain -40˚
- Cleaning/replacing filters does not help and air flow from regeneration blower is good.
- You can crush the desiccant beads between your fingers.
Does desiccant need to be replaced?
Desiccant doesn’t last forever, regardless of the type of compressed air dryer that you have. All desiccant needs to be replaced or replenished eventually.
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.
Are desiccant air dryers good?
Desiccant dryers make wonderful air dryers for any season because they don’t rely on a reduced dew point like refrigerated dryers do. They can actually filter moisture in temperatures as cold as -100 degrees Fahrenheit.
Does desiccant stop working?
Almost indefinitely. The key to retaining sachets usefulness is to keep it under air tight conditions until it needs to be used. Silica gel will absorb moisture from any environment, so a sachet left out in the open will immediately start taking up water vapour.
What is the typical service life of an air dryer desiccant cartridge?
In linehaul applications, coalescing air dryer cartridges can last one to two years while non-coalescing cartridges can last two to three years. Other applications can shorten cartridge life. As a general rule, follow the manufacturer’s recommended replacement intervals to get the best performance.
How often should an air dryer be serviced?
For the standard trucking level which is typically pick up/delivery operations, Bendix suggests you replace your air dryer every 200,000 miles, or 24 months. In this application, you should also be checking for moisture in the dryer every 25,000 miles, or three months.
How do I reactivate my desiccant?
You can do so by pouring the inactive silica gel beads in a thin layer on a baking sheet. You should then preheat the oven to 175 degrees Fahrenheit and bake the beads for 15 minutes. The heat in the oven will draw the moisture out of the desiccant pack, reactivating the drying agent.
How do you reactivate silica packets?
Heat the oven to a temperature between 175 degrees and 200 degrees Fahrenheit. Place the pan of silica gel in the oven and allow it to bake for 15 minutes. The heat in the oven draws the moisture out of the silica gel, reactivating the drying agent.
How does a regenerative desiccant air dryer work?
In a pressure swing type regenerative dryer, the regeneration of the desiccant bed is accomplished by expanding some of the dried air to near atmospheric pressure and directing it across the wet desiccant bed. This swing in pressure produces expanded air with a very low water vapor concentration.
What is a desiccant dryer and how does it work?
One unique thing about desiccant dryers compared to other plastic dryers is that they use heated dry air to remove the moisture from resin pellets, rather than ambient air. In desiccant drying systems, the air is circulated in a closed-loop process, preventing air from exiting the top of the hopper and into the ambient air.
What is a single tower dryer?
Van Air is the originator of single tower dryer technology. Our single tower desiccant compressed air dryers prevent moisture in pipelines by suppressing the pressure dew point by 20° F or more from the inlet temperature. Water vapor is removed from the air as it passes through a bed of deliquescent desiccant within the dryer.
How often should I Fill my air dryer with absorbent desiccant?
Typically, a properly sized single tower air dryer only needs to be filled with absorbent desiccant two or three times per year. In addition to the energy savings, operating costs are minimized since desiccant usage is based on actual air flow through the dryer.
What is the PSI of dry-O-Lite desiccant?
Flow (SCFM) based on 100 PSI. Price of dryer does NOT include initial fill of Dry-O-Lite desiccant. Dry-O-Lite desiccant is sold in 50 lb. bags, 50 lb. pails, 506 lb. metal drums and 2000 lb. bulk bags.
