Screw compressor seal clearance

[Rizwan.O.]

Dear all

There is a ceased 'oil flooded' Screw compressor at our facility which has worn shaft and seal end. reference attached in the image. I would like to know that how much clearance (with compressor housing) is permissible at this end for proper sealing.

Kindly share any reference if possible. That will be much appreciated.

Compressor Specs:
Make: LiUTECH
Model: LU 132W
Flowrate: 24 m3/min
Power: 132kW

Thanks a lot
Regards