Butterfly valve with electrically conductive slide bearing

摘要

Disc valve with a valve housing (1) made of metal, a flap plate (2) which is arranged in the housing (1), a shaft (3) made of metal, which is arranged in a channel formed by the housing (1) and with which the flap plate (2) can be moved between a closed position and an open position, and an annular seal (4) through which the shaft (3) protrudes and which seals the channel, the shaft (3) being surrounded by a slide bearing (6) in the channel which is made of an electrically conductive plastic and via which the valve housing (1) is electrically connected to the shaft (3), characterized in that the ring seal (4) is arranged between the sliding bearing (6) and the valve plate (2) so that the sliding bearing (6) is not exposed to a product flowing through the disc valve, the sliding bearing (6) widens towards one end to rest against the valve housing (1) with preload, and to its other end tapered towards in order to rest against the shaft (3) with preload, the wall thickness of the sliding bearing (6) continuously decreases towards its ends, and the sliding bearing (6) has an end section (6a, 6b) at each of its two ends, in which the sliding bearing ( 6) has slots (8) running in the axial direction, the slots (8) extending from an edge of the sliding bearing (6) to a central section (6c) of the sliding bearing (6).