O2 COMPRESSOR TECHNICAL BLOG

Fixed-Frequency vs Variable-Frequency Oil-Free Compressor Platforms

The approved Drive sources separate a CM_G 20-40 bar fixed-frequency family from a CM_GPV 20-40 bar variable-frequency family. That family distinction is suitable for catalogue organization because it is explicitly documented.

What the source boundary tells you

The family names support the frequency/control distinction and the 20-40 bar source range. They do not establish a particular flow, motor, final operating point or oxygen-service approval for a project that has not been matched to a source row.

What the RFQ should add

Provide required flow range, selected discharge pressure, suction conditions, duty profile, electrical supply and control philosophy. For any O2 duty, also provide the oxygen-service material, cleanliness and safety requirements so suitability can be reviewed separately.