Underwater Vacuum Leak Test
The ASTM vacuum leak test goes by a number of different names, including submersion leak test, underwater immersion test, or submersion test. This test method is performed using a clear, acrylic tank to hold water. Packages are submerged in the tank which is then shut closed and a vacuum is pulled on the water tank.
If there are any leaks in the package (breaches to the sterile barrier), the user will see a small, steady stream emanating from the package while it is under vacuum. This test method is useful for pouches, trays, and some rigid containers like vials and bottles.
Underwater vacuum leak testing is a whole-package integrity test capable of detecting gross leaks in the body of packages or in package seals.
Frequently asked questions
What does underwater vacuum leak test for?
This test method covers the determination of gross leaks in flexible packaging containing headspace.
How sensitive is underwater vacuum leak testing?
Underwater vacuum leak per ASTM D3078 is sensitive down to 250 microns for flexible packaging.
Why use underwater vacuum leak?
Underwater vacuum leak testing may be appropriate especially for small packages and containers which are difficult to evaluate by other package integrity test methods.