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About Vacuum Decay Method The vacuum decay test is a nondestructive, quantitative measurement approach for detecting leakage in nonporous, rigid or flexible packages. Leakage in the package headspace gas region and/or below the product-fill level may be detected given appropriately designed test parameters and if product properties allow.
Vacuum decay leak tests are useful in all phases of the product life cycle. Tests require anywhere from a few seconds to a few minutes to perform. Longer test times are necessary for testing larger-volume packages or for detection of the smallest leaks.
System DescriptionThe MLT-01 micro leak tester for vacuum decay testing features a network of conduits and valves connecting a test chamber to a high-resolution pressure sensor and an external vacuum source. The instrument includes a PLC control unit, HMI touch screen, electronic controls, and utilizes an external gas flow meter for system performance checks. The test chamber is specially designed to securely enclose the test package and can incorporate tooling to restrict component movement or expansion as needed.
Test ProcessSecure the sample in the MLT-01 micro leak tester's chamber and apply negative pressure in the FILL stage.
When the desired negative pressure is reached, the SETTLE stage begins to accommodate component stretching or flexing.
After settling, the vacuum decay TEST phase starts, measuring any pressure increase.
In the VENT stage, release remaining negative pressure to the atmosphere.
If the sample stays within your specified range, it PASSES; otherwise, it FAILS.
Technical FeaturesOperated via a PLC system and an HMI human-machine interface.
Tailored chamber sizes are an option.
It exhibits a high sensitivity for detecting minute leaks.
It calculates a leak rate effectively.
It offers a straightforward and highly efficient method.
The primary testing steps include filling, settling, and testing.
StandardASTM F2338
Main Parameters| Test Range | 1Pa |
| Sensitivity | 1~3μm |
| Chamber size | Made-On-Demand |
| Vacuum pump | to be prepared by user |
| Power Supply | AC 110~220V 50Hz |
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