Method of making packing material having expanded graphite dispe

Details Method of making packing material having expanded graphite dispe Method of making packing material having expanded graphite dispe

1996-07-22

1998-02-10

Gutierrez, Diego F. F.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277100, 277105, 277117, 277227, 277229, F16J 1522, F16J 1524

Patent

active

057160554

ABSTRACT:
A minimum leakage packing system is provided for sealing pump shafts and the like. The packing is manufactured from twisted, exfoliated extruded, pultruded or slit graphite material that is braided, twisted, laid up or otherwise combined to form mechanical packing. A lubricant and/or sealant may be applied to the finished packing. Graphite foil may be applied to the packing for enhanced properties. The packing system preferably consists of a precision wedge set and at least three rings including compressible graphite material, the rings compressed to different percentages of their original heights. The outside rings will have the most compression and the inner ring or rings of the multi-ring assembly the least. All should be compressed less than the maximum amount to permit high conformance to the surface being sealed. The system may have an optional gasket washer following the last ring of compressed graphite material.

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Machine Design "Seal", p. 42, Figure 6 & col. 1.

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