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Photo of the mechanical seal ring surface finish band

2017-11-23View Original

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The light band in the image is seen under a sodium light source through an optical flat. There is only 1 light band in the image; the flatness of the toroidal surface is 0.00029 mm. Generally, for mechanical seal toroidal surfaces, 3 or fewer light bands with a flatness of 0.00087 mm are considered acceptable. The flatness meets the requirement of 0.0009 mm.

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