Industrial environments are messy, vibrating, and thermally unstable. Helium is elusive, prone to “ghost” signals and background contamination. How do you maintain 10-5 mbar l/s sensitivity when the reality of your production floor is working against you?
The “Bumpy Road” of Real-World Testing
In a laboratory, leak testing is straightforward. In a high-speed manufacturing facility, where parts are warm from brazing, ambient helium levels fluctuate, and cycle-time pressure is relentless, it is an engineering challenge.
Many manufacturers struggle with “False Failures”, where perfectly good components are rejected because the testing system cannot distinguish between a leak and “noise.” This doesn’t just waste parts; it erodes trust in the quality process and creates unnecessary bottlenecks.
The Pillar of Success: Bespoke Fixture Design
The machine is only as good as the interface. At Nolek, we believe the fixture is the heart of the “Total Solution.”
Poorly designed fixtures are the leading cause of testing inconsistency. If the seal isn’t repeatable or if the fixture “traps” helium from a previous test, the results are compromised. Which is why our bespoke fixtures are engineered to:
- Ensure Rapid Purging: Removing tracer gas efficiently between cycles to prevent background build-up.
- Compensate for Part Variance: Accommodating the slight physical deviations inherent in mass-produced manifolds or heat exchangers.
- Manage Thermal Stability: Accounting for parts that may still be cooling down from the production line.
Managing Throughput Without Sacrificing Precision
As production volumes for Heat Pumps and Data Centre cooling components scale up, the testing station must keep pace. Nolek addresses this through Multiplexed Testing and Intelligent Sequencing.
Instead of testing one part at a time, A Nolek system can be configured to test multiple chambers or components simultaneously. By using “Gross-to-Fine” sequencing, where a quick air test filters out major defects before the helium vacuum stage, we protect the sensitive mass spectrometer from saturation, keeping the line moving and the “uptime” high.
The Pre-Sale Technical Consultancy
Our value begins long before the machine arrives on the floor. Our Pre-Sale Technical Consultancy involves a deep dive into your specific “bumpy road.” We analyse your plumbing, your background helium levels, and your part geometry to design a system that works in your environment, not just in a brochure.
The Workflow for Success
To achieve accuracy at scale, we recommend a four-step best practice:
- Validate the Plumbing: Ensuring the testing circuit itself is leak-free and uses non-permeable materials.
- Background Suppression: Utilizing software to “zero out” atmospheric helium noise dynamically.
- Trend Analysis: Use data capture to monitor if leak rates are slowly drifting, allowing for preventative maintenance before a failure occurs.
- Operator Training: Standardising the loading and unloading process to eliminate human-induced variability.
Don’t Let the Production Floor Compromise Your Quality
Precision is a choice, not an accident. By focusing on fixture integrity and environmental management, you will ensure that your sensitivity remains a reality, no matter how chaotic the factory floor.
