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Coobase CBS desiccant media is made of 82% of Silica Gel, 16% of 7 Micron x 6 mm minimum glass fiber,2% of face coating; Coobase CBM media is made of 42% of Amorphous silicon dioxide 82%,40% of sodium aluminosilicate,16% of 7 Micron x 6 mm minimum glass fiber and 2% face coating.
A test about Coobase desiccant media was completed at March 23, 2015 by NREL, and the result shows an average of 8.5% more moisture removed on an exact comparison basis. The stability of Coobase media adsorption performance was obviously higher than average level verified by numbers of American and European users.
Coobase desiccant media will retain 90% of it's original capacity over a 10 year period (87,600hrs) when operated in clean air. This reduction in capacity is due to natural aging of the desiccant and does not account for any contaminants, which are passed through the rotor during its lifetime.
Accumulated dust and dirt simply covers and sometimes fills the pores of the desiccant. In some cases, this type contamination can be blown out and/or washed from the media. This normally results in a gradual, long-term decrease in performance.
Oils or greases in the air stream can rapidly deteriorate performance by masking the pores of the desiccant.
Chemical contaminants tend to attack the structure of the desiccant and most times are difficult if not impossible to remove. This type of contamination can lead to a rapid deterioration of adsorption capacity.
Filtration of both process and reactivation air steams is necessary to ensure longevity of performance. Experience has shown that the most dirt accumulation and resulting loss of performance are from poor filter maintenance. This is especially true on the reactivation side of the rotor as most attention is normally on the process air stream.
The following list is representative of contaminants, which can adversely affect performance:
Alkaline detergents/cleaning compounds, etc.
Any high PH （8.0+） air stream
Typically, a 1000 ppm concentration is the upper threshold of exposure for gases. Any oils, greases, or high PH contaminants will immediately begin to affect performance.
The desiccant media can be washed 4-5 times before breakdown of the desiccant/substrate bond occurs. Acceptable PH range for washing of media is 1.5 to 7.5 PH.
Deterioration of the desiccant media can occur from repeated exposure to water droplets, such as from condensate carryover. The media tends to soften when soaked with water and structural integrity can be compromised. Over time, water carryover can break down the desiccant and release it from the substrate, literally washing the desiccant from the media.
Deterioration of the face coating and damage to the desiccant substrate can also occur from overheating the rotor. Normal operating temperatures should be below 400°F.
Although Coobase guarantees its products perform as specified, the above factors limit the extent to which performance can be guaranteed long term.