STANDARD RECIRCULATION FILTER (SRF)0 pages

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gl Donaldson.

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ÏSM FILTRATION SOLUTIONS

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STANDARD RECIRCULATION

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FILTER (SRF)

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Disk Drive

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DESCRIPTION

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The Standard Recirculation Filter (SRF)

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is comprised of an electrostatic filtration

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media encapsulated between two layers of

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protective scrim.

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PRINCIPLE OF OPERATION

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The SRF is designed to provide protection

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from particles. The high efficiency, low

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pressure drop construction provides

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optimized particle clean-up performance.

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INSTALLATION IN DRIVE

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The SRF is located directly in the path

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of the airflow generated by the rotating

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disks. In a hard disk drive, this location is

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typically opposite the read/write arm. The

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installation of the filter into the drive can

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be accomplished by several techniques.

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The most common method is to insert the filter into a

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holder integral to the base casting. Alternative methods

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include inserting the filter into a slot in a plastic bracket or

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ultrasonically welding the filter to the plastic bracket. The

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plastic bracket, in turn, is custom designed to fit into the

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base casting.

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