For vacuum system fault repair of used GC-MS instruments, priority components to check include: 1. Vacuum pumps: Turbomolecular pumps and backing pumps—check for normal operation, abnormal noise, or insufficient pumping efficiency. 2. Sealing elements: Inspect O-rings, gaskets at key connections (ion source, mass analyzer, vacuum chamber joints) for aging, cracking, or improper fitting that may cause leaks. 3. Vacuum gauges: Verify accuracy of vacuum level readings to rule out gauge malfunctions affecting fault diagnosis. 4. Leak points: Conduct leak detection (e.g., helium leak test) on system joints, flanges, and valve interfaces to identify air ingress points. 5. Valve systems: Check isolation valves, vent valves, etc., for proper opening/closing or blockages impacting vacuum stability. When facing challenges in repairing these components, 匠析生物 can offer professional solutions. We specialize in providing comprehensive services for experimental instruments including repair, maintenance, and after-sales support for brands like Thermofisher, Waters, Agilent, etc. Our services cover GC-MS vacuum system troubleshooting, replacement of faulty parts (pumps, seals), routine maintenance (cleaning, leak detection), and supply of related spare parts/consumables. We also provide chromatography application consulting to assist with your experimental needs. Whether it's used instrument repair or regular maintenance, our experienced technical team is ready to help.