The Hidden Cost of Knock-Off Filters: Why Cheap Filters Destroy Machinery
Media Migration
Cheap filters use poorly bonded cellulose (paper) media. Under high fluid velocity, this paper starts to disintegrate—a phenomenon called media migration. Instead of filtering the system, the filter itself becomes the contaminant, flooding the system with paper fibers.
Bypass Valve Failures
When a filter clogs, an internal bypass valve opens to ensure the machine isn't starved of oil. Knock-off filters often feature cheap plastic springs in these valves that either jam shut (starving the pump) or jam open permanently (filtering nothing).
The Illusion of Savings
Saving ₹500 on a hydraulic filter for an excavator or VMC can result in a ₹50,000 repair bill when the main hydraulic pump scores its internal bearings due to contaminated fluid.
Engineering Conclusion
Always source filters from ISO-certified manufacturers who provide hydrostatic collapse pressure reports and guaranteed Beta efficiencies.
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