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Hallite Partners with MSOE to Develop Leading-Edge Test Method to Protect Hydraulic Systems from Dirt and Dust

First-of-its kind test for rod wipers sets new industry criteria for contaminant exclusion


News provided by

Hallite Seals Americas, Inc.

Jan 29, 2015, 08:00 ET

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WIXOM, Mich., Jan. 29, 2015 /PRNewswire/ -- Hallite Seals Americas, Inc., a leading global manufacturer of high-performance hydraulic sealing solutions, announced today the successful development of a new test procedure for assessing the amount of dirt and dust that enters a typical hydraulic system through the rod wiper. Developed in cooperation with Milwaukee School of Engineering's (MSOE) Fluid Power Institute™, the test breaks new ground because it features a novel methodology for measuring dry particles attributed to being a major cause of hydraulic system inefficiency, degradation and failure. It fills a critical need within the cylinder manufacturing industry.

Most hydraulic systems employ numerous cylinders which function like a syringe, drawing in contaminants. The rod wiper located in the sealing configuration of a hydraulic cylinder is designed to limit the ingression of dirt, dust and grit, making it one of the most critical system components. However, there is no specific ISO method for testing a rod wiper's ability to prevent >4, >6 and >14 micron particles from entering the hydraulic system. These microscopic particle sizes are most damaging to hydraulic systems as referenced in ISO 4406 for coding contamination levels in hydraulic fluids.

"The MSOE rod wiper test uses an online particle counting method instead of traditional gravimetric measurement where particles are weighed," says Chuck White, Business Development Manager for Hallite. "The particle count approach provides a more complete and accurate assessment of contaminants than weight because two samples can have the same gravimetric weight in oil, but one may contain many more dirt particles than the other indicating much greater potential for damage to precision components. This new method raises the bar on keeping solid contaminants out of the system now to avoid problems later."

MSOE used the SAE J1195  standard combined with best practices to establish a baseline for developing the rod wiper test procedure. A rig was built in the MSOE test lab and parameters such as duration, cycle rate, pressure and temperature were set using input from hydraulic cylinder manufacturers to best simulate the rigor of actual field conditions. It took eight months of development, verification, trials and adjustments to establish a repeatable test procedure. Once the new procedure was completed and proven, MSOE tested the Hallite 520 and 820 wipers against two competitors.

The test procedure involved installing the rod wiper into the specified test fixture, heating the hydraulic circulation fluid to 150 degrees F, pumping the oil over the top of the rod and letting it drain down into the reservoir while circulating high-velocity particles (ISO 12103-1-A4 Course Test Dust) of contamination in the chamber. The objective was to count how much dirt and grit got past the wiper. Based on the conditions and method used, data suggests that the Hallite 520 and 820 wipers allowed less than one half the amount of contaminant from entering into the test system compared to competitive wipers that were tested.

A White Paper has been produced for the MSOE test. And a graphic animation of the test depicting how it was conducted was created. Both are available upon request.

"Hallite has a reputation as a trusted brand for wiper technology, but we needed competitive third-party validation for the integrity of our material and design," says White. "We are very excited about the performance results because they demonstrate how our products work in some of the most aggressive field environments. Also, working together with MSOE and key customers to develop and conduct a test of this quality is invaluable as it forged a three-way partnership that emphasizes the importance of rod wipers and gives Hallite an opportunity to demonstrate our continued commitment to understanding and developing technologies to improve the effectiveness of hydraulics systems.

Finally, by cooperating with one of the leading academic fluid power research laboratories in the nation where students are building and managing the mechanical functions for test fixtures, Hallite is providing real-world interaction to help the next generation of hydraulics engineers learn more about seals and how they interact. This paves the path for innovative future testing methods."

About Hallite
Hallite is a leading manufacturer of high performance hydraulic sealing solutions, such as wiper seals and other customer gaskets, rubber and plastics parts. For over 100 years Hallite has manufactured a wide range of products for a variety of markets including mining, off-highway, construction, agriculture and material handling. Engineered in a wide variety of advanced materials, the full range of products are readily accessible through Hallite's global manufacturing presence and a worldwide network of service partners. Hallite is a member of the Fenner PLC Group of companies. For more information about Hallite, visit www.hallite.com.

About MSOE Fluid Power Institute™
MSOE's Fluid Power Institute™ (FPI) has been a pioneer in motion control and fluid power education since its inception in 1962.  FPI has active programs in fluid power systems design, electro-hydraulics, test & evaluation, fluid development and contamination control. FPI recently added a new off-campus 12,500sqft laboratory facility to support the R&D needs of the fluid power Industry. This high-bay laboratory has drive-in access, reconfigurable workspaces, and multiple power units for realistic endurance testing of fluid power equipment. For more information, visit www.msoe.edu/fpi.

CONTACT:


Hallite Seals Americas, Inc.

Hallite

Lisa Gentile, +1 248.668.5204

Shanta Mauney, +1 281.804.8900

Marketing Manager

PR/Media Relations

[email protected]

[email protected]



MSOE Fluid Power Institute™

MSOE

Thomas S. Wanke, CFPE, +1 414.277.7191

JoEllen Burdue, +1 414.277.7117

Director FPI

Director of Media Relations

[email protected]

[email protected]

SOURCE Hallite Seals Americas, Inc.

Related Links

http://us.hallite.com

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