Quality Filtration Says Improved Test Standards Benefit End-Users

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In their efforts to support the International Organization for Standardization, premier filter manufacturer Quality Filtration reviews significant changes in filtration testing standards. They claim new testing standards are leading the movement toward more effective filtration implements for customers worldwide.

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New testing standards and education have altered everything we used to know about filtration selection, and all for the better.

As a leading supplier to the fluid power industry, Quality Filtration strives to educate customers on the effects of contamination as a leading cause of hydraulic system and component failure. The company supports the industry’s work with the International Organization for Standardization (ISO) to improve test standards that allow end users to evaluate filtration performance.

“New testing standards and education have altered everything we used to know about filtration selection, and all for the better,” said Ivan Sheffield, Vice President of Sales and Marketing for Quality Filtration. "The test changes are a major step toward providing end users with improved data to assess filter selection.”

A standard multipass method for evaluating performance of hydraulic fluid power filter elements under steady-state conditions was first developed as ISO 4572. The procedure provided a basis for comparison of the relative performance characteristics of various filter elements and had not been revised since 1981. Then things began to change:

The standard multipass test Method for Evaluating Filtration Performance of a Fine Filter Element (ISO 16889), improved the previous standard to ensure more accuracy in real world environments.

Major revisions included:

  •     New test dust replaced AC Fine Test Dust no longer available
  • New particle counter calibration procedure used fluid that is National Institute of Standards and Technology (NIST)-traceable
  • New specification provided for an on-line particle counter (ISO 4402 particle counter calibration standard became ISO 11711)
  • New validation procedure instituted

Sheffield added the National Fluid Power Association and ISO are also developing a new standard for cyclic flow test procedures, ISO/WD 23369.2, to reflect capabilities of a filter element when subjected to varying cyclic flow conditions. The new procedure supplements the basic steady-state flow test for filter elements to be placed in-service with cyclic flow operating conditions. The proposed method is the same as a standard multipass test, except an electrically-controlled valve is installed to allow the flow cycle from zero-flow to full-flow.

“The perfect filter would have no pressure drop, hold an unlimited amount of dirt, be small enough to fit anywhere in a system, meet ISO cleanliness codes per ISO 4406, have high capture efficiency and cost nothing,” Sheffield explained. “The best compromise has always been the biggest challenge for filter manufacturers. New test changes are a major step toward providing end-users with better tools to evaluate filter selection.”

ISO is the world’s largest developer of voluntary International Standards that provide state-of-the-art specifications for products through global consensus. Founded in 1947, ISO has published more than 19,500 International Standards covering technology and business.

About Quality Filtration
Quality Filtration is a premier filter company that designs, builds and manufactures high performance cartridge and spin-on elements for the global industrial hydraulic and lubrication markets. The company quality controls and lab-tests all its products to meet or exceed specifications of the Original Equipment Manufacturer (OEM) using the most advanced microglass media in the industry. The comprehensive line includes applications for a wide range of markets, including pulp and paper, oil reclamation, oil flushing, steel mills, plastic injection molding, automobile assembly and general manufacturing.

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Lara Denney
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