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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Varian rotary vane pump lost all its oil through exhaust?
over the weekend I had a vacuum system fail on me.
In a nutshell, from high to low vac: vac chamber turbo pump electronic safety valve foreline trap rotary pump oil mist filter exhaust hose There were no power surges. It looks to me like the safety valve overheated and failed. This introduces a small air leak so the system can slowly vent. The rotary pump spewed out all it's oil through the exhaust. The filter was full, dripping and there's a puddle on the floor. The RVP is almost completely empty. I can't fathom what sort of failure could cause this. I checked the exhaust filter for little bits of material (to see if something crumbled inside the pump) but it was clean except for the oil. Is there a problem is these pumps are not perfectly level? I can't see how that would cause this... but that's all I've got right now... it's not that far off level... Any ideas? Thanks everybody! |
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