Mainly used in small bulk handling systems where material is transported pneumatically in a hopper or container. The valve has a structure that, thanks to the central axis perpendicular to the transport pipes, regulates the flow of material within the ducts. Rotating by 120°, it alternates the opening and  closing of the connection lines and allows the correct routing of the material. The two displacement limits allow for recognition of the operating position and proper operation of the system. Welded tube sections allow for perfect integration with transport tubes of different external dimensions than standard.