How to address the issue of oil presence in gauge compressors (screw compressors)
Thread Content
The gauge compressor is oil-filled, and many valves at the site do not respond properly. How can this be fixed so that there is no oil involved? If there is a simple and easy way to solve this problem, please share it. Thank you!
For those with filters, already contaminated cleaning pipelines with sluggish operation, replace the positioner solenoid valve.
Do you mean abnormal phenomena such as inadequate valve operation caused by oil in the instrument air being delivered? Under normal circumstances, a relevant filtering device should be installed at the outlet of the compressed air compressor to filter out impurities and separate oil mist ； Secondly, relevant filtering and dewatering devices should also be available at the specific points of use, especially at those where important valves are installed.
It would be better to clarify your question: is it the high oil content in the instrument air supply, or is it the excessive amount of oil in the lubricator of the valve actuator? The former is unlikely, as the instrument air supply is always gas that has been dried through a purifier. If there is oil present, it is likely a problem with the filter in the screw compressor; the adsorbent in the purifier must then have become contaminated and is no longer usable. The root cause of the problem should be identified first, and then solutions can be explored for reference.
The compressed air produced by screw compressors certainly contains oil, water, and dust; it requires subsequent treatment using cold dryers and heat-free dryers to remove oil, dust, and water, so as to obtain qualified instrument air. I’ve encountered situations where the compressed air produced by the air compressor was sent directly to the control valve via a buffer tank; there was an excessive amount of oil and water in it, which caused the positioners to fail frequently. Requests to install drying devices were ignored: L
I’m fine here; at least I have a refrigerated dryer, but it isn’t very effective
The centrifuge is oil-free; where have you seen an oil-free screw compressor, as mentioned by the original poster?
When it is said to be oil-free, it means that the oil circuit and the gas circuit are separated. Ingersoll Rand offers compressors of this type; you can search for oil-free screw compressors.