Ingersoll Rand screw compressor-oil in the air intake
885/5000
Greetings from Venezuela.
I know that the topic that I am referring to, has been discussed on this page.
We have an ingersoll rand screw compressor, and it has leaking refigerant oil by air intake. In some places they say that this problem is frequent when the machine stops abruptly, but checking the diagram I observed that the Admission Valve (intake valve), has anti-return function (check) and I think that the oil leakage by said element should not be something common.
Could this problem be caused if the scavenge screen valve is damaged or the separator cartridges?
I try to disarm the intake valve, removing two retaining rings but can not dismantle anything else, the other parts are coupled to pressure?
I'm sorry for my English is not very good.
I hope you can help me.
Sincerely Alejandro Gacia.
2 Answers
Hola Alejandro!
Thank you for your question.
You need to double-check the inlet valve.
Even with the check-valve inside, oil can still flow backwards when the compressor stops, if the sealing is not 100%.
Also, with some models, there's a small bypass hole/tube to allow air being sucked in during unload running. This bypass sometimes has it's own small check valve. Is that the case with your compressor?
You should be able to completely remove the inlet valve from the compressor element (air-end).
But be careful when actually opening up the inlet valve itself. The main body has a powerful spring inside (under tension!). Be careful when opening it!
Hope this was of some help. Please let me know if you fixed the problem or not.
All the best,
Cas
Sorry forgot to answer this part:
"Could this problem be caused if the scavenge screen valve is damaged or the separator cartridges?"
No, this is most likely a problem with the intake valve only. It closes too slow, the check-valve mechanism is stuck/slow or the sealing is not 100%.
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