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Chesterton packing technology for longer life in slurry applications

A.W. Chesterton Co. has introduced its latest compression packing product DualPac 2211, which uses a proprietary braiding technology that combines two materials to maximise performance characteristics of both.

DualPac 2211 combines the resilience of aramid and sealing capability of expanded PTFE fibres to reduce or eliminate the need for gland adjustments and results in improvement in mean-time-between failures in tough slurry applications.

Aramids are tough and resilient but have high friction and fret shafts and sleeves, while PTFEs are extremely low friction and kind to shafts but can consolidate and extrude.

All of these issues cause a loss of compression, resulting in leakage and requiring packing adjustments.

By combining two complimentary materials in one packing, Chesterton DualPac 2211 is built to address these issues.

Using the company’s patent pending braiding technology, the graphite filled ePTFE can be placed against the shaft where it provides high sealing and low friction, and a high strength and resiliency aramid is placed against the stuffing box bore to resist consolidation without shaft wear.

A.W. Chesterton’s lab and in-field tests have shown that DualPac 2211 requires fewer gland adjustments, resulting in extended life in severe service applications.

In addition to that, the packing can be installed in multiple configurations, eliminating the need for an anti-extrusion ring and the need for stocking multiple packing products.

Targeted applications include critical equipment such as pumps, agitators, and mixers handling abrasive slurries in markets such as mining and ore processing.