M series is the oldest series of Ingersoll rand, Ingersoll rand air compressor first enter the Chinese market is to be the models of this series, V series is Ingersoll rand in the United States acquired all shares after the Shanghai factory (the original Ingersoll rand is a sino-us joint venture) design of new models in Shanghai, and give it to design a memorable SIRC logo, The birth of V series has far-reaching historical significance, because its design, structure and technological performance are more suitable for the needs of the Chinese market. R series is a new model developed in recent years, no matter from the appearance or internal structure has a unique style, and R series of permanent magnet frequency conversion unit is currently the most high-end models, configuration and production costs are currently the highest, belonging to the oil machine inside the most luxurious products!
To summarize the comparison of the series: M series from small power to high power (350KW) specifications are complete, and now there are frequency conversion units in research and development and manufacturing; V series from 7KW-250KW are in production, and 22KW units have variable frequency models, cost-effective, more practical. R series is currently 22KW-160KW, with a slightly higher price than the other two series. The three collections represent three different styles, each with its own strengths. As for which one is more suitable for you, it's a matter of opinion.
In general, these machines are very good. We have seen some Ingersoll Rand air compressors in some friends' factories for more than ten or twenty years. This is the power of the brand.