superheat using 404 screw comp?

What is the lowest suction superheat allowed when using screw compressors on a med temp rack?

I read 4 to 10 is normal due to efficiency.

Thanks

A specific Make & Model number would give you a direct answer.

Other than that, I've seen & read 10* to 20* suction superheat on screw compressors.

hsk7461-80 bitzer compressors on a medium temp rack using 404A

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