Compressor valve help
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The nitrogen debugging of a newly repaired compressor is normal. After entering the process gas, there is a sound of cylinder collision, and the vibration increases accordingly. Remove the gas valve and check. In the case of the secondary gas valve in the picture, is there liquid?
I don’t know what your compressor looks like, so I’d better send you a video. To determine whether there is liquid in it, you can check it at the inlet filter and interstage cooler. Look at the picture to see if the scaling situation is related to the physical and chemical properties of the medium. For reference.
This is a reciprocating compressor. My personal judgment is that the compression bolt is loose and it will make a crisp clicking sound. If it is filled with liquid, it will make a dull sound.
There is scale, there is a high possibility of liquid condensation, and there are pits at the bottom of the cylinder. I don’t know if they just happen or if they have always been like this. The corrosive surface of the medium is large, and the surface of the medium containing impurities is large. Especially after starting the machine, remove the filter and check whether the inlet and outlet temperatures are normal, especially the temperature of the intercooler cannot be lower than the gas condensation temperature. I hope you are well and can let me know. Thank you, and whether there are both back and forth strokes or only one stroke that hits the cylinder. Has the dead center gap been measured? The normal nitrogen test is fine, and it should not be a matter of the dead center gap.
It should be a problem with the process medium. Lower the inlet air temperature and add a filter before the air inlet to drain the condensation. It can basically be determined.
The nitrogen test machine was normal. After running for a few days, there was a sound of cylinder collision. After running for about 8 hours, I stopped to check the starting and ending points of the piston. The top dead center was 2.9 and the bottom dead center was 2. The compressor inlet pipe was insulated. After running for about 25 minutes with process gas, there was a cylinder installation sound. The oil pressure dropped and the vibration increased. I stopped to check the valve and checked for cracks in the bolts of the secondary cylinder cylinder head.