Group: Donaldson Company
Catalog excerpts
ADSORBENT POUCH Disk Drive The Adsorbent Pouch Filter (APF) is a porous membrane pouch containing a specially formulated adsorbent element. The APF is designed to provide protection from hydrocarbons, acid gases, and the effects of water vapor such as condensation and corrosion. The high efficiency filtration membrane encapsulates the adsorbent element while remaining permeable to gaseous contamination and water vapor. The adsorbent element is specially formulated to control humidity and to adsorb acid gases and hydrocarbons from internal and external sources. The most common adsorbents and their associated functions are as follows: • Activated Carbon: Relative humidity control and adsorption of hydrocarbons • Chemically Treated Activated Carbon: Relative humidity control and adsorption of acid gases and hydrocarbons • Silica Gel: Relative humidity control The APF is typically located in a cavity inside the disk drive. It may also be attached to the cover or base using a pressure-sensitive adhesive. Because the adsorption mechanism is diffusion- based, the pouch can be located anywhere inside the disk drive When using an APF filter, it is recommended that diffusion protection be incorporated into the drive. Diffusion protection reduces the amount of hydrocarbons, water vapor, and acid gases entering the drive from the surrounding environment. PTFE Membrane Adsorbent Material
Open the catalog to page 1ADSORBENT POUCH FILTER (APF) PRODUCT GUIDELINES AND SPECIFICATIONS Membrane MVTR (Moisture Vapor ncn , , .PT.. cne Contamination Control Designed to pass the most stringent cleanliness specifications. Manufactured in a cleanroom environment RELATIVE HUMIDITY TEST Time (hours) Adsorbent Filter Contact Donaldson today for more information! Disk Drive Adsorbent Pouch Filter (07/10) © 2010 Donaldson Company. All Rights Reserved. Information in this document is subject to change without notice. Adsorbent Filter Seoul, Korea Hong Kong Rayong, Thailand
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