Definition & Uses of Compression Packings Presented by the FSA Knowledge Series
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Definition & Uses of Compression Packings Control of fluid loss is essential to the successful operation of mechanical equipment used in fluid handling. Various methods are utilized to control leakage at shafts, rods, or valve stems and other functional parts of equipment requiring containment of liquids or gases.
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Definition & Uses of Compression Packings The oldest and still most common of these sealing devices is compression packing, so called because of the manner in which it performs the sealing function. Made from relatively soft, pliant materials, compression or mechanical packings consist of a number of rings, which are inserted into the annular space (stuffing box) between the rotating or reciprocating member and the body of the pump or valve (see Figure 1). 4
Definition & Uses of Compression Packings
By tightening a follower or packing gland against the top or outboard ring, pressure is transmitted to the packing set, which expands the rings radially against the side of the stuffing box and the reciprocating or rotating member and effects a seal.
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Definition & Uses of Compression Packings Compression packings are the most common sealing device for controlling fluid loss in mechanical equipment.
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Definition & Uses of Compression Packings Compression packings find their major use in the process industries (e.g., petrochemical, pharmaceutical, chemical, pulp & paper, steel mills) and the service industries (e.g., utilities, marine, water, sewage, fossil / nuclear power plants).
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