STANDARD BREATHER FILTER (SBF)0 pages

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¿Si Donaldson. I STANDARD BREATHER

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FILTRATION SOLUTIONS

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FILTER (SBF)

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Disk Drive

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DESCRIPTION

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The Standard Breather Filter (SBF) is

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comprised of a filtration membrane and a

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pressure-sensitive adhesive ring for securing

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the filter to the drive. A diffusion channel can

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be incorporated within the adhesive layers.

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PRINCIPLE OF OPERATION

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The SBF captures particulate contamination

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as air flows into the drive through the

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filtration membrane.

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INSTALLATION IN DRIVE

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The SBF is placed over a breather hole or

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a diffusion channel. While this filter can be

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located outside the disk drive, ideally, it

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is located inside the drive with a diffusion

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channel between the breather and the

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outside environment. The filter location

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should be in a low-pressure area of the

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drive so air can enter through the breather.

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Generally, the best location is on the cover

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as close as possible to the spindle.

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Airflow restriction into the drive is affected by the size of the

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filter, choice of filter materials, and the design of the diffusion

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channel. There is a trade-off between the airflow restriction and

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the amount of diffusion protection.

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Airflow

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PTFE Membrane

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Adhesive

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