Getting to Know Multi-Pass Testing: Comparing Tests

Posted by Dustin Flynn on Wed, Apr. 24, 2019

In the world of filtration, we differentiate filters and measure their performance using various testing methods, otherwise known as multi-pass testing. In order to understand the testing process, we've created two videos that cover how filters are tested. In the video below, we'll cover four different methods of testing: ISO 16889, which is the industry standard test; ISO/CD 23369 Cyclic Flow Test, which is proposed to replace the current industry standard test; The Cyclic Stabilization Test; and Hy-Pro’s Dynamic Filter Efficiency Test.

Multi Pass Testing Comparisons _ 1080_Pre_Render
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Topics: filters, DFE, multi-pass testing

Getting to Know Multi-Pass Testing: Terms and Definitions

Posted by Dustin Flynn on Fri, Apr. 12, 2019

In the world of filtration, we differentiate filters and measure their performance using various testing methods, otherwise known as multi-pass testing. In order to understand the testing process, we've created two videos that cover how filters are tested. In the first video below, we'll go over the terms and definitions you need to know to understand how multi-pass testing works and what's measured by it. 

Multi Pass Testing
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Topics: filters, DFE, multi-pass testing

High Surface Finish Defects at an Automotive Stamping Plant

Posted by Jim Harlan on Tue, Jan. 03, 2017

The Application

An automotive stamping plant operating large presses to produce body panels was experiencing high surface finish defect scrap. Lubricating oil contamination was causing surface imperfections that would be visible after painting.

The Problem

The uncoiler/washer lube oil system was protected by an off-line filtration system fitted with CJC stacked disc cellulose media filter inserts (elements). Oil analysis revealed an operating ISO code of 23/19/11. Patch analysis showed cellulose fibers were shedding into the oil from the filter inserts downstream of the filtration system.

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Topics: ISO 4406, offline filtration, case study, fluid transfer, filters, DFE

  

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