Mr.

Hi everybody! I am examining a case of a J&E HallSrew HS2028 compressor that failed. The cast body of the compressor cracked/fractured into pieces destroying all of the internal parts of the compressor (stars, slide valves etc). The claim is that large amounts of liquid refrigerant entered the compressor from the liquid injection line (used to cool the oil) due to a fault of the controller that closes the solenoid valve.
Has anybody faced the similar problems and if yeas what was the cause of the failure?
Thanks!

I have seen ammonia compressors that have taken liquid refrigerant in the suction. On one pices of the rotor lobes broke off.
Overfeeding of oil cooling liquid usually causes premature bearing failure, the excess refrigerant washes the lubricating oil away. But if you had a massive amount of liquid refrigerant injected the damage you described could certainly result. You have tight tolerances and a fluid that doesn't compress. Something is going to break.