We have installed a new compressor for nitrogen service which is designed and built as per standard API 618. The nitrogen which is being compressed is highly dry and dew point is around -100 deg C whixh makes it bone dry gas. Now, supplier is putting up a restriction not to use the highly dried nitrogen having dew point less than -60 deg c. To my knowledge, higher value of dew point of the gas being compressed is a concern for the compressor as liquid droplets can damage the compressor parts, but how come higher degree of dryness is dangerous for the conpressor. Is this the case for non lubricated pistions only or applicable to lubricated pistons also.