Test Application from TQC
Submersal Leak Detection & Leak Location
known as a Leak Test Dunk Tank)
Water submersal or
dunk tanks are a widely used method for location of leaks in complex
assemblies and products with air bubbles present around the leaking
Most often, differential pressure
or vacuum decay is used first to qualify a tight part.
If the part leaks, simple decay of pressure does not show the leakage
path. If a part fails the quantifiable test then one method of detecting
the leak path is to submerge in water and look for bubbles.
All of these examples use the technique
of submerging the part in water. Some of these examples were used
as the only leak test method. All of these examples had complex
sealing requirements prior to the pressure being applied.
Each of the systems locate the part
or assembly into a fixture. The assembly is then clamped into place
either by hand operated toggle clamps or automatically. Some sealing
areas and the length of seal are considerable, requiring significant
seal forces to both compress the seal and overcome the forces generated
by the internal pressure.
In all instances an operator makes
a subjective visual check as to whether the part is good or bad.
TQC specialise in leak testing and detection
equipment and use off the shelf leak test instruments for air decay
leak testing and for tracer gas testing.
examples of water dunk tanks for testing parts underwater
If you have a current project that you are
already looking at, or you are considering improvements to your
production in the near future, call us and we will be happy to offer
our professional advice & visit you at your site.