The maxi multi-channel round jet nozzles of the 600.387 series generate a circular, very powerful air jet. Due to the large nozzle cross-section, these nozzles focus large quantities of air into a concentrated jet that has a powerful impact even over large distances. In spite of this, the noise level still remains low.
The Occupational Safety and Health Administration (OSHA) is a US federal authority for prevention of accidents at work.