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.
The Problem: Too Much Filter-Related Downtime
A paper machine was experiencing excessive downtime as maintenance personnel was frequently servicing a Brand X filter element installed on the lube system. The element would reach terminal ∆P and require replacement every 8.5 days on average.
Today’s oil suppliers are often required to provide fluid at or below a specified ISO Cleanliness Code. One such supplier was experiencing short filter element life (15 days) on the system (7 element multi-round housing) used to achieve the required ISO Cleanliness Code of 18/16/13 in a single pass as 15W-40 oil is transferred from their bulk storage tanks to tanker trucks for delivery.
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 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.
The Problem: Premature Failure of Diesel Engines
Today's diesel engines require cleaner fuel with injector pressures approaching 30,000 PSI and the evolution of injectors into sophisticated expensive electronic components. Diesel engine manufacturers have learned that ultra-fine particles that were of little consequence at 3,000 PSI are now causing premature failures at 30,000 PSI.