STANDARD BREATHER FILTER (SBF)0 pages
¿Si Donaldson. I STANDARD BREATHER
nnnnFILTRATION SOLUTIONS
nnnnFILTER (SBF)
nnnnDisk Drive
nnnnDESCRIPTION
nnnnThe Standard Breather Filter (SBF) is
nnnncomprised of a filtration membrane and a
nnnnpressure-sensitive adhesive ring for securing
nnnnthe filter to the drive. A diffusion channel can
nnnnbe incorporated within the adhesive layers.
nnnnPRINCIPLE OF OPERATION
nnnnThe SBF captures particulate contamination
nnnnas air flows into the drive through the
nnnnfiltration membrane.
nnnnINSTALLATION IN DRIVE
nnnnThe SBF is placed over a breather hole or
nnnna diffusion channel. While this filter can be
nnnnlocated outside the disk drive, ideally, it
nnnnis located inside the drive with a diffusion
nnnnchannel between the breather and the
nnnnoutside environment. The filter location
nnnnshould be in a low-pressure area of the
nnnndrive so air can enter through the breather.
nnnnGenerally, the best location is on the cover
nnnnas close as possible to the spindle.
nnnnAirflow restriction into the drive is affected by the size of the
nnnnfilter, choice of filter materials, and the design of the diffusion
nnnnchannel. There is a trade-off between the airflow restriction and
nnnnthe amount of diffusion protection.
nnnnAirflow
nnnnPTFE Membrane
nnnnAdhesive
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