Compressed air often contains impurities such as moisture, oil, and particulate matter that can adversely affect the performance and longevity of downstream pneumatic equipment and processes. Therefore, compressed air should undergo post-treatment to remove these impurities and ensure that the air is clean and dry before it is used.

Post-treatment of compressed air typically involves filtration, drying, and sometimes purification. Filtration removes particulate matter such as dust, dirt, and rust from the compressed air. Drying removes moisture from the air to prevent corrosion and other problems associated with the presence of water. Purification is used to remove oil, odors, and other contaminants from the compressed air.

Proper post-treatment of compressed air can improve the efficiency and reliability of pneumatic equipment and processes, reduce downtime and maintenance costs, and ensure the quality of the end product. Therefore, it is important to carefully consider the post-treatment requirements for any compressed air system and to select the appropriate post-treatment equipment based on the specific needs of the application.