As experts in the leak testing we realize the value of educating our customers and providing helpful leak testing resources to help you make educated decisions when selecting the right leak test equipment and processes for your applications. Below you will find a collection of leak testing basics, leak testing methods and video demonstrations to help guide you when developing your application specifications.
Below is a library of leak testing methods we specialize in. Each method contains a detailed description of the test, in addition to a schematic showing how the test functions within the tester. We also include what Uson leak testers are best suited for each respective test method.
When using the Back-Pressure Flow leak test method, the part is continuously pressurized while air is escaping to atmosphere through the passages being checked.
The Burst Leak Test requires filling a product slowly through a flow valve. After the burst, the pressure rapidly drops to near zero.
The Continuous Flow leak test method allows the flow sensor to measure the flow faster.
A Crack Leak test is set up to measure the pressure at which a product, such as a check valve, opens and allows air to flow through.
One of the fastest methods of leak testing, differential pressure decay is well suited for many applications.
As the name implies, the exercise/fluff leak test is used as a settling or seating step in order to condition the part before a test program is initiated.
The Force Decay leak test is used to test the seal integrity of a flexible or semi-rigid package that contains a headspace. It is well suited to test non-porous package material such as films, foils or laminates.
The Laminar Flow leak test is a sensitive flow technique that is commonly used on large volumes where the leak integrity specification is high.
The mass flow leak test measures the amount of air passing through an object using units of measurement of sccm or liters/time period.
The Occlusion Leak test is used to test a product’s open passages by trapping pressure inside the product and then measuring an expected pressure loss.
This test method measures the drop in pressure on a gauge (transducer) during the leak test.
A Pressure Rise Leak test works in the opposite way of a pressure decay test.
A Seal Creep Leak test tests products, such as blister packages, that must hold a certain amount of air pressure without failing, but may increase in size or “creep up” during the test.
Also referred to as a Sealed Component Challenge, Volumetric, or Volume Verification test, the Sealed Component Leak Test is used to test parts that are sealed and do not have a port to depressurize.
The Vacuum Burst Leak Test is useful for testing check valves, relief valves, seal strength and package integrity.
Vacuum Decay leak testing is used on a variety of products that can only be leak tested at negative pressure.