GAS DIFFUSING MECHANISM

摘要

The apparatus provides for releasably coupling diffusion headers to a main gas distribution line which is fixedly positioned in an aeration tank. The main distribution line includes a plurality of access passages adapted to receive gas communication channels extending from each diffusion header. The access passages are provided with positive closure means which prevent the escape of gas from the distribution line when a diffusion header is removed from the tank for service. The closure means are opened when a header is lowered by a swing-type linkage and the header channel is inserted into the access passage.