Vacuum Decay

Vacuum decay is a container integrity test method taking advantage of the fundamental physical properties. This test method which was proved over decades has been improved with the advancement of technology.

Vacuum decay has been substantiated as one of the most practical and sensitive vacuum-based leak detection method. This test gives a reliable, reproducible, repeatable and accurate quantitative result with a pass or fail determination.

Packages can be non-destructively evaluated using the VeriPac inspection method which is based on vacuum decay technology. Package types include filled and sealed rigid, semi-rigid and flexible packaging made of non-porous or porous materials. This vacuum decay method developed by PTI’s VeriPac instruments are capable of detecting leaks in the single digit micron range.

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Transformative Shifts in Vacuum Decay
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VeriPac Vacuum Decay Technology

VeriPac leak testers connect to a test chamber that is specially designed to contain the package to be tested. The package is placed inside the test chamber to which vacuum is applied. The single or dual vacuum transducer technology is used to monitor the test chamber for both the level of vacuum as well as the change in vacuum over a predetermined test time. The changes in absolute and differential vacuum indicate the presence of leaks and defects within the package. The sensitivity of a test is a function of the package design, the package test fixture and critical test parameters of time and pressure. Test systems can be designed for manual or fully automated operation. This inspection method is suitable for laboratory offline testing and production applications for QA/QC statistical process control. The test cycle takes only a few seconds, is non-invasive and non-destructive to both product and package.

VeriPac inspection systems utilize an ASTM approved vacuum decay leak test method (F2338) recognized by the FDA as a consensus standard for package integrity testing. This test method was developed using VeriPac leak test instruments. Vacuum decay technology is also referenced in the new USP <1207> Chapter Guidance as a deterministic test method for package integrity testing. This method is also listed in ISO 11607.

The criteria for selecting the appropriate VeriPac model is based on the type of package and leak test sensitivity desired. Configurations can be optimized with either single or dual high-resolution transducers as well as type of vacuum supply, i.e. internal, external, high vacuum, etc.

PTI advances in high vacuum testing and developed the next generation PERMA- VAC technology that addresses vacuum decay detection at the very core of physical test measurement, controlling the test system volume and maximizing the SNR between good and defective samples. The PERMA-VAC technology advancements make the VeriPac line of test systems the most sensitive and reliable vacuum-based leak test available on the market.

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