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Case Study: Chesterton DualPac® Technology in Fan Pump


SJP case study APAC0008 – Chesterton DualPac® products – Chesterton Packing


Selecting the correct packing for your application has always been a balancing act between different materials. Chesterton DualPac® 2211 is built to combine the two best and complimentary materials in one packing. Our parented braiding technology can be placed against the shaft where it will provide superior sealing with low friction. In combination with a high strength and resiliency aramid placed against the stuffing box bore, the solution will resist consolidation without shaft wear, providing the results our customers are seeking.

Products featured in this study:

Chesterton Dualpac Technology seal close up

Chesterton DualPac 2211 is an innovative packing technology for longer life in severe slurry applications.




Every 12 months a horizontal split case fan pump required a replacement or repaired shaft, and a repacking due to high leakage from the use of Aramid packing in a paper stock slurry application.

Root Cause

Paper stock (slurry) reduced the packing life, and the aramid fibre material caused the shaft to wear excessively.


Extend MTBR (Mean Time Between Repair) to over 12 months.

Rotating element of the fan pump

Rotating element of the fan pump.



Chesterton installed 10mm c/s of Chesterton DualPac® 2211 packing in the following ring orientation below.

Packing placement in application

Packing placement in application.

DualPac® 2211 installation (1st end ring).

DualPac® 2211 installation (1st end ring).


Client Reported

  • MTBR extended to over 36 months and continues in service.
  • Savings realised due to production downtime, maintenance time and replacement.
  • Repair shaft cost over the first three year alone were significant.
Chesterton DualPac® Technology: Rotating element ready for installation

Rotating element ready for installation.

Chesterton DualPac® 2211 is innovative packing technology

Chesterton DualPac® 2211 is an innovative packing technology for longer life in severe slurry applications.

About Us


Chesterton® is a world leader in helping process industry companies and manufacturers improve the reliability and efficiency of their rotating, stationary, and fluid power equipment platforms. We are known across a wide range of industries for our award-winning pump and valve sealing solutions, applications expertise, equipment maintenance and wear-prevention products, and knowledgeable hands-on local service​.

Mentioned in the case study:

SJP Sealing Technology (S) Pte Ltd
Exclusive Distributor of Chesterton products – Singapore & Malaysia

SJP Sealing Technology (S) Pte Ltd






® Registered trademark owned by A.W. Chesterton Company
Case Number APAC0008 – Issued 08/20

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