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) by filling one circuit with helium or a helium-nitrogen mixture. These systems—including vacuum chambers, sniffing probes, and automated industrial lines—are highly accurate for finding internal and external cracks, gasket failures, or corrosion in food, HVAC, and industrial applications.
Key Components & Methods
- Mass Spectrometer Leak Detector (MSLD): The core device that detects helium molecules, providing, high precision.
- Vacuum Method (Vacuum Hood Test): The PHE is placed in a chamber which is evacuated; helium is introduced, and the system detects any gas passing through to the vacuum, identifying the total leak rate.
- Sniffer Method (Over-Pressure Test): The heat exchanger is pressurized with helium, and a "sniffer" probe scans the exterior (e.g., plates, gaskets) to locate leaks.
- Automated Systems: Used in manufacturing, these systems include robotic sniffers and helium recovery to reuse gas.
Advantages and Considerations
- High Sensitivity: Detects microscopic leaks that pressure tests or dyes cannot.
- Non-Destructive: Allows for testing without damaging the unit.
- Cost/Time: Helium systems can be expensive and require careful preparation (e.g., cleaning/draining the exchanger).
- Limitations: While effective, some helium tests can indicate if a leak exists but may not pinpoint the exact damaged plate.
Common Applications
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Non-Destructive Leak Test of Plate Heat Exchangers (PHE)
INFICON
https://www.inficon.com › news › non-destructive-solut...
INFICON
https://www.inficon.com › news › non-destructive-solut...
If there is a leak, the LDS3000 Helium Leak Detector detects the helium gas as it exits the heat exchanger and gives an alarm signal. Interested in ...Read more
Plate Leak Checks: Dye vs. Helium Testing
AGC Heat Transfer
https://www.agcheattransfer.com › blog › plate-leak-ch...
AGC Heat Transfer
https://www.agcheattransfer.com › blog › plate-leak-ch...
Sep 25, 2024 — While helium testing can indicate if leaks are present, it does not visually identify specific leak locations between plates. Therefore, finding ...Read more
Plate Heat Exchanger Helium Leak Detection System
HCTE PTE. LTD.
https://www.isoautotest.com › plate-heat-exchanger-heli...
HCTE PTE. LTD.
https://www.isoautotest.com › plate-heat-exchanger-heli...
The equipment utilizes helium as a tracer gas, places the workpiece in a vacuum chamber and fills it with helium, and rapidly and accurately judges the leakage.Read more
Methods of leak detection in plate heat exchangers
Queen's University Belfast
https://pureadmin.qub.ac.uk › mcelwaine_report
Queen's University Belfast
https://pureadmin.qub.ac.uk › mcelwaine_report
PDF
The probe can detect helium leakage from a pressurised circuit into a low volume of air circulation system. The probe can detect the presence of helium down to ...Read more
27 pages
Web results
The proactive approach to safety and uptime
Alfa Laval, US
https://www.alfalaval.us › integrity-testing-for-gphe
Alfa Laval, US
https://www.alfalaval.us › integrity-testing-for-gphe
This heat exchanger leak detection method provides the insight needed to maintain control over your process and safeguard uptime. In addition, the proactive ...Read more
PHE & TUBULAR HEAT EXCHANGER INTEGRITY TESTS
EIT International
https://www.eit-international.com › 2020/06 › He...
EIT International
https://www.eit-international.com › 2020/06 › He...
PDF
The Hexteq system is a portable test system designed to assess the integrity of PHE & Tubular heat exchangers and consists of three items of equipment. The ...Read more
2 pages
helium mass spectrum leak detector
hunan gonoava instrument co ltd
https://www.gonoava.com › Blog
hunan gonoava instrument co ltd
https://www.gonoava.com › Blog
Apr 1, 2024 — Plate heat exchanger is a new type of high efficiency and compact heat exchanger, which is generally composed of three main parts: heat transfer ...Read more
Helium Leak Tests and Heat Exchangers
Tracerco
https://tracerco.com › refineries-and-petrochemical › he...
Tracerco
https://tracerco.com › refineries-and-petrochemical › he...
Tracerco's specialised chemical and isotope tracers are used for detecting leaks in heat exchangers, no matter how small the potential leak.Read more
HEAT EXCHANGERS
Nolek
https://www.nolek.com › uploads › 2015/09 › hea...
Nolek
https://www.nolek.com › uploads › 2015/09 › hea...
PDF
If the product has a leak the helium leak detector will detect it. The detector measure continuously from the background check and onwards. 7. After the test ...Read more
2 pages