The Shanghai EVP NHJ-600 helium mass spectrometer leak detector has been successfully applied to the vacuum box helium leak detection system, meeting the customer’s requirements for rapid helium detection in large-scale production.
Application: Rapid leak detection of compressors
Leakage detection production rhythm: The rhythm is 30s to 60s, and 30-60 units can be detected for leakage in one hour
Number of vacuum boxes: 1. Check one compressor at a time
Built in leak detector: NHJ-600
Leakage detection method: Based on the principle of helium mass spectrometry leakage detection, helium gas is used as a tracer gas. Helium gas is filled into the compressor in a vacuum box, and then the leakage situation is judged by the helium mass spectrometer leakage detector NHJ-600. In vacuum mode, the leakage rate is 1 × 10-7 pa m3/s.
Basic workflow:
1. Manually place the compressor into the vacuum box, start the button, and close the vacuum box.
2. After the door is closed in place, the cylinder clamp clamps the compressor and clamps it in place.
3. The vacuum pump vacuums the vacuum box to a certain pressure, opens the leak detection valve at the front end of the leak detector to test the background of the vacuum box, and records the background value.
4. Close the leak detection valve, then the system fills the compressor with helium at the specified pressure, and the leak detector opens the leak detection valve to test the leakage rate.
5.If there is leakage in the compressor, the leakage rate value will change, and the system will automatically determine how high the leakage rate is Then output the signal.
6. The inspection is completed, the vacuum box is deflated and the helium in the compressor is discharged outdoors through pipelines Helium is not recovered.
Shanghai EVP provides a full range of helium mass spectrometry leak detectors, ranging from portable leak detectors to desktop leak detectors and leak detection modules, to meet various applications. At the same time, it provides various helium mass spectrometry leak detection systems tailored to mass production needs, which can be used for new energy battery shell leak detection, air conditioning system leak detection, fuel system leak detection, packaging industry leak detection, power supply system leak detection, pharmaceutical packaging system leak detection, etc.
Shanghai EVP not only acts as an agent for various high-end precision instruments and equipment, but also provides customized solutions for different customers and can collaborate with them to develop new project applications!
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