Sealpak®47 is an extrusion packing composed of pure PTFE, graphite and special lubricant. Sealpak®47 is soft and dense packing, with a very low coefficient of friction. This product has excellent resistance to gas permeation and is self-lubricating. Sealpak®47 remains soft and pliable even after long service, reducing the wear on the shaft and sleeves. The addition of graphite allows for improved heat dissipation.
It is suitable for use in pumps, mixers, sliders, valves and rotating equipment in general, but also in many static applications. Due to its softness, it is normally installed with a braided top and bottom anti-extrusion ring. The excellent chemical resistance of the Sealpak® products allow its use with the majority of industrial fluids, including aggressive acids and caustics. It can also be used with abrasive fluids and solids in suspension.
It is not suitable for liquid alkaline metals, free fluorine compounds, high temperatures and pressure ratings, nitric acid in high concentration, and oxygen.
Because of its high malleability, Sealpak® 47 can be applied in equipment with misaligned shafts or with an oval shaped stuffing box. Its excellent lubrication allows it to be utilized in equipment with no flush water. The inclusion of graphite allows for usage in service conditions where higher shaft speeds and elevated pressure is observed.
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