The type for unpressurised conditions or where the pressure is only slightly above atmospheric pressure.This model has an extremely flexible sealing lip and an additional protective lip. Outer case: Stainless steel or Cold-rolled steel. Characteristics: Extremely flexible sealing lip; Improved frictional properties; Defined seal path width.Operating limits: Max. peripheral speed: 30m/s; Temperature range : -60 to 250°CMax. pressure: 0.05MpaMax. Centre offset: 0.2mmMax. concentricity tolerance: 0.3mm