This document provides information on industry process and automation solutions for potentially explosive environments. It discusses the ATEX directives for explosive atmospheres and defines equipment categories and groups. The document focuses on Bonfiglioli's series of bevel helical gear units that are certified for use in explosive environments. It provides details on the construction, ordering, mounting, lubrication, loads, dimensions, and declarations of conformity for the ATEX-specified gear units across various power ratings. Motor combinations for the gear units are also covered.