In these two episodes, the RuB valves demonstrates their features and their advantages comparing with a valve of dubious origin that will not be able to pass the various examinations and will not receive a certificate of quality at the end of the course. In the first episode, the valves are in school with a "teacher" valve, while in the second episode we follow the valves until their installation. Both episodes were published in 7 languages ??and shown in trade fairs and international meetings.