Leak testing of pipe joints, tubes and fittings in heating and refrigeration components such as coils and compressors during assembly manufacturing is critical. With the permissible leak rate as low as 0.5 grams of refrigerant loss per year, conventional sniffer testing is not a reliable method to detect such small leaks. Sniffer tests sample the background to detect helium escaping from a leak. However, background helium concentration fluctuations can make it difficult to consistently distinguish good from bad product and can result in false leak failures.
Nitrogen purge leak testing from CTS eliminates the factors affecting accuracy:
- Solve the problem of background contamination affecting testing results at a lower cost than hard vacuum mass spectrometer testing
- Automate the test to get quantitative measurement and remove operator subjectivity and dependence
- Reduce false failures and gain a more repeatable test process
Watch the video below and scroll down to learn more about nitrogen leak detection technology from CTS or contact us to discuss your requirements.
What Is the Nitrogen Leak Testing Procedure?
The CTS nitrogen purge solution is a tracer gas leak test system that combines the TracerMate II instrument to control the test and provide results, a mass spectrometer and the CTS purging clamshell, which is clamped onto joint(s) being tested.
The CTS nitrogen purge clamshell device (image, right) has inner and outer chambers that surround the part test area. The chambers have ports that allow nitrogen to enter the cavity and force out ambient atmosphere.
During the leak test cycle controlled by the TracerMate II, the clamshell inner chamber collects the tracer gas leaking from the part. The outer chamber then provides a constant low positive pressure nitrogen curtain to hold back and prevent ambient background from entering, effectively isolating the inner chamber.
The gas from the chamber is drawn into the mass spectrometer, which analyzes the gas mixture to measure the amount of tracer gas. The mass spectrometer communicates results to the TracerMate II, and these readings are then displayed as the instrument determines and signals a “pass” or “fail” (green lights or red lights) for the nitrogen leak test.
Turnkey Solution for Leak Testing Pipes, Joints, Tubes and Fittings
The TracerMate II is an “all in one” nitrogen leak detection system that provides evacuation, test pressure, a gross leak test, tracer gas backfill, and the exhaust process. We offer this high-sensitivity tracer gas system integrated with custom handheld devices or as a benchtop configuration to meet your testing needs (image, right).
Our handheld nitrogen purge clam shell devices are small, custom designed to your application, and easily maneuvered to clamp over components, fittings, and joints. The nitrogen purge custom benchtop test fixtures are designed to fit a broad range of applications.
Complete Leak Test Station for Heating and Refrigeration Components
CTS can integrate the Nitrogen Purge technology into a complete solution like the TracerMate II HVAC-R Portable Leak Test System. The system enables the use of as many probes as required on up to 20 different leak locations.
Nitrogen Purge Systems Designed for Accurate Helium Leak Testing
Cincinnati Test Systems’ patented nitrogen purge leak testing system eliminates false leak failures. The patented clam shell device (image, below) uses low pressure nitrogen to create a helium-free environment, allowing the mass spectrometer gas analyzer to sample and detect micro-leaks.
Nitrogen purge leak testing is an effective method of detecting micro-leaks in pipe joints, tubing, and small parts. Industries ranging from HVAC/R to medical choose tracer gas systems because they are more reliable than other tests, many of which are easily affected by environmental factors.
- Compatible with multiple gases, including helium, forming gas, and refrigerants
- Detects leaks as low as 10-6 scc/s
- Low cost tracer gas testing method
- Increased sensitivity for improved leak detection accuracy: reduces background to 10-7 atm-cc/s range
- Versatility for use in a broad range of heating and cooling applications
Improve Your Tracer Gas Testing Accuracy with Nitrogen Purge Technology
Cincinnati Test Systems wants to be your partner in leak testing. Our nitrogen purge systems help you improve your efficiency and achieve more accurate leak testing results. Request a quote or contact us for the high accuracy solution your nitrogen leak test procedure needs.