Patent ID: 8459863
Filing Date: 2013-06-11
Classification: B01F

Abstract:
1. An agitator device for circulating a liquid in a clearing basin, comprising: a drive device for immersed operation below a surface of the liquid; a housing to house the drive device; a sealing chamber arranged inside the housing; a drive shaft connected to the drive device and guided out of the housing; a slide-ring seal received in the sealing chamber for sealing around the drive shaft to prevent the liquid from entering the sealing chamber; a line for receiving an oil supply connected to the sealing chamber and guided to above the surface of the liquid so that the oil received in the sealing chamber is under a greater pressure than the liquid in a vicinity of the drive shaft for preventing a penetration of the liquid around the slide-ring seal, wherein the line is formed transparent at least in a section located above the surface of the liquid to visually check an oil level in the sealing chamber from outside the clearing basin.