Industrial Utility Efficiency    

ISO and CAGI

Many astute air compressor users have noticed the Compressed Air and Gas Institute (CAGI) air compressor data sheets, dated after June 2020, have a new term listed; isentropic efficiency. Isentropic Efficiency will be the new standard of reference for a true comparison of the overall efficiency of air compressors at any rated discharge pressure. Now users can see which company produces the most efficient product with an easy reference percentage number. The compressed air industry, in conjunction with CAGI, has been trying to make fair comparisons between air compressors for years. 
Most readers of this magazine are familiar with the ISO 9000 and 14000 families of standards.  The 9000 family pertains to quality management systems and the 14000 family deals with environmental management.
Industry standards serve a very important purpose for the end users of compressed air equipment.  If the standards are well written, they can help to promote the equipment that they govern, as long as the equipment manufacturers properly apply and promote the standards.
Compressors in today’s market must meet a variety of standards written by a wide range of organizations throughout the world.   Until recently, most standards were written to deal with safety, both mechanical and electrical, and performance of the individual components of a compressed air system.