Screw compressor failure

[Grizzly]

Yes, the compression of liquid between the rotors causes the two to separate and grind the housing.
But J&E have single screw and two daisies (stars), so I don't think that large amount of liquid could cause that.

Good points, also there is a restricting orifice to flash off the liquid if I remember correctly.

I suppose it's possible that the liquid refrigerant level in the compressor could increase.
Due to the solenoid remaining open. But surely the crankcase heater would boil off the refrigerant.

I would be looking at your system level controls for high levels.
Resulting in Suction line liquid carry over.

I am at a loss as to how you could create such a huge amount of damage otherwise.
The one Benifit of Hall screws is that the star wheels are Sacrificial.
And easily replaced.

What you are describing christossev sound more like huge thermal shock damage.
But all the Hallscrews that I used to look after were well maintained and never failed the way you describe.
Their own manual even states after 25yrs running check the main bearings for wear.

There is more to this than you are saying?
Grizzly