Can We Speed Up Large Part Leak Testing?

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Can We Speed Up Large Part Leak Testing?

  • Leak testing large volume automotive components –transfer cases, oil pan assemblies, reservoirs , intake manifolds, and transmissions, and the like– poses a different set of challenges than those of testing smaller parts.
  • Some automotive manufacturers have straddled their operations with antiquated pressure decay leak test methods for such large parts. Pressure decay, or differential pressure decay testing, is rarely a best match leak test method for large parts because the larger the part volume, the smaller the change in pressure for a given leak rate.  With pressure testing, as you increase test volumes the result is inherently long test times AND increased measurement errors.
  • Using mass flow leak testing methods for large parts is always faster with acceptable gage R&R easier to achieve. However, a vigilant eye on how production rates are impacting the bottom line is compelling many manufacturers of larger automotive parts to ask
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