Meanwhile, this groove prevents the seal from being extruded when the sight glass is tightened. The location of this seal also allows the use of a softer Elastomer, which guarantees better and easier sealing.Fluid level sight glasses GN 743. GN743.
GN 42 leveling feet are simple, economically priced components and can be used universally thanks to the wide range of possible combinations of the base and the stud / socket versions..