The invention relates to a hot dip coating device (100) for coating a metal strip with molten metal (200) and to a method for operating said device. The metal strip is deviated in the molten metal (200) by means of a roller (120). Said roller is rotatably received in a bearing (144) in a supporting arm (105). The bearing is mounted in a bearing compartment (142). In order to seal the bearing compartment (142) from the undesired entry of molten metal (200), a sluice is arranged between the bearing compartment (142) and a roller passage (136) to the molten metal (200) and is impinged upon by a gaseous medium at gas pressure to seal the sluice chamber (132) from the molten metal (200). The aim of the invention is to reduce the maintenance work required for said sluice. To achieve this, the sluice chamber (132) is configured in the shape of a diving bell having a channel-type exit (134) which is open to the surrounding molten metal (200).
展开▼
