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Chesterton® 11K Rod Seal Gets the Job Done in Steel Mill


Case study APAC0029 – Chesterton products – Chesterton EPS

Chesterton - Global Solutions, Local Service



A client working in a steel mill was dealing with a plunger pump experiencing frequent leakage caused by an unbalanced load. Their solution had to be resistant to high temperatures, therefore reducing downtime for repairs and replacement. Chesterton suggested a solution created with the Chesterton® 11K Rod Seal and Chesterton® 19K Split Wear Rings, and the replacement cycle has now extended.

Products featured in the case study:

The unique Chesterton® 11K split seal with dual material combination and spacer

Chesterton 11K

Chesterton 19K



A six thousand ton plunger pump in a forging area needs frequent maintenance. Leaks occur in just a few months.

Root Cause

Unbalanced load and sliding heat destroy the rubber / cloth packing which causes leakage.


A sealing solution resistant to high temperatures.

Leakage before installation.



Manufacturer: HYDRAULIK DUISBURG (made in Germany)

Equipment: triple piston pump x 6

Hydraulic oil: Emulsion W / O 3%

Pressure: 31.5MPa11K 71 x 91 x 35 mm AWC860 / 860 19K 71 × 76 × 9 mm

Chesterton® 11K Rod Seal

Patented simple dual component, split seal assembly for hydraulic sealing, eliminating the need for equipment disassembly.

Chesterton® 19K Split Wear Rings

These bearings reduce radial movement to help extend seal life. The exceptional physical properties and built-in lubricants make it suitable for use on rods, rams, or pistons in reciprocating, rotary, or static applications.

Chesterton 11K Rod Seal

Chesterton 19K


The replacement cycle has been extended from 3 months to 1 year.

Limited leakage after installation.

About Us

Chesterton global solutions, local service

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 this case study:


Exclusive Distributor of Chesterton products – Japan



® Registered trademark owned by A.W. Chesterton Company
Case Study APAC0030 – Issued 08/21

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