Leak Testing Resources
Leak Testing Methods & Resources To Help You Make Informed Decisions
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.
Leak Testing Methods
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.
Back-Pressure Flow Test
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.
Burst Test
The Burst Leak Test requires filling a product slowly through a flow valve. After the burst, the pressure rapidly drops to near zero.
Continuous Flow Test
The Continuous Flow leak test method allows the flow sensor to measure the flow faster.
Crack Test
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.
Differential Pressure Decay Test
One of the fastest methods of leak testing, differential pressure decay is well suited for many applications.
Differential Vacuum Decay Test
Differential vacuum decay test works similar to the differential pressure decay test except that the system is evacuated using an internal or external vacuum.
Exercise/Fluff Leak Test
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.
Force Decay Test
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.
Laminar Flow Leak Test
The Laminar Flow leak test is a sensitive flow technique that is commonly used on large volumes where the leak integrity specification is high.
Mass Flow Leak Test
The mass flow leak test measures the amount of air passing through an object using units of measurement of sccm or liters/time period.
Occlusion Leak Test
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.
Pressure Decay Leak Test
This test method measures the drop in pressure on a gauge (transducer) during the leak test.
Pressure Rise Test
A Pressure Rise Leak test works in the opposite way of a pressure decay test.
Seal Creep Leak 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.
Sealed Component Leak 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.
Vacuum Burst Leak Test
The Vacuum Burst Leak Test is useful for testing check valves, relief valves, seal strength and package integrity.
Vacuum Decay Leak Test
Vacuum Decay leak testing is used on a variety of products that can only be leak tested at negative pressure.
Videos
Have Questions? We Can Help!
Our leak testing experts are available to answer your questions and guidance on the right tester for your application.
Need Service or Support?
Request repairs, service or RMA’s conveniently online or give us a call. Our support team will answer your questions and coordinate your service needs.
Uson L.P. - Corporate
8640 N. Eldridge Parkway
Houston, TX 77041 USA
Tel: +1-281-671-2000
Fax: +1-281-671-2001
Email: info@uson.com
Uson UK – Europe
Western Way
Bury St. Edmunds
Suffolk, IP33 3SP United Kingdom
Tel: +44-1284-760606
Fax: +44-1284-763049
Email: salesuk@uson.com
Uson – China
Room 601, 567 Lan Gao Road
Shanghai, 200333, China
Main: 021-583 65859, 021-583 59187
Fax: 021-583 59185, 021-337 73559
Email: sales@uson.com.cn
