| 摘要 |
The invention relates to a switch for branching off bulk material flows, the switch includes a rotary plug ( 1 ) which is arranged in a fixed housing having preferably three connection openings. In a first position the plug establishes a connection between a first pair of connection openings and, by rotation into a second position, establishes a connection between a second pair of connection openings, a gap being provided between the rotary plug ( 1 ) and the housing in such a way as to arrange the rotary plug ( 1 ) in the housing in a non-contact manner without any additional contact sealing elements. The plug ( 1 ) and/or said housing includes at least one labyrinth sealing arrangement ( 7 ).
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