When dry air is needed for industrial processes, air dryers are crucial components. An air dryer's main function is to eliminate moisture from compressed air, which can harm downstream equipment and cause corrosion. A periodic desiccant replacement is necessary to maintain the operation of an air dryer because it is the component that removes moisture from compressed air.
Desiccants are substances that can pull moisture out of the atmosphere. Desiccants come in a wide variety of varieties, but silica gel and activated alumina are the two that are most frequently employed in air dryers. Within the air drier, the desiccant is normally enclosed in a cylindrical container, through which compressed air passes, allowing the desiccant to absorb moisture.
The type and quality of the desiccant, the air dryer's operating conditions, and the quantity and caliber of compressed air flowing through the system are only a few of the variables that affect a desiccant's lifespan. Desiccants in air dryers should typically be changed every one to two years or when they have used up all of their moisture-absorbency.
Monitoring the pressure decrease over the desiccant bed is one approach to detect if the desiccant needs to be changed. The desiccant becomes saturated as it takes in moisture, which causes a rise in the pressure drop over the desiccant bed. It's time to change the desiccant when the pressure decrease reaches the manufacturer's recommended limit.
Conducting a moisture analysis of the compressed air downstream from the air drier is another approach to determine whether the desiccant needs to be replaced. Compressed air's dew point exceeding the air dryer's rated dew point is a sign that the desiccant needs to be replaced because it is no longer performing as intended.
It's vital to remember that depending on the particular application and operational circumstances, the desiccant replacement frequency may change. For instance, if there are a lot of impurities in the compressed air, including oil and dust, the desiccant may get fouled more quickly and lose effectiveness faster. In these circumstances, it could be essential to utilize additional filtering to get rid of impurities before the compressed air enters the air dryer or to replace the desiccant more frequently.
For the air dryer to operate at its best, frequent maintenance is equally important as desiccant replacement on a regular basis. This include testing valves and fittings, checking and replacing filters, and keeping track of the system's operational conditions. The desiccant's lifespan can be increased with routine maintenance, which will also guarantee the air dryer's efficient and dependable operation.
In conclusion, desiccants in air dryers need to be replaced every one to two years or when they are no longer able to absorb moisture at their maximum rate. The desiccant's lifespan can change based on the particular application and operational circumstances. To identify when the desiccant needs to be replaced, it's critical to track the pressure decrease across the desiccant bed and conduct a moisture study of the compressed air downstream from the air dryer. To guarantee the air dryer's peak performance and increase the desiccant's lifespan, regular maintenance is also necessary.
Lingyu desiccant compressed air dryer -20C -40C -70C dew point
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