Barrier pressure units of the SBFrange perform all the functions of abarrier system essential for operatingdouble seals (circulation and cooling ofthe barrier medium, pressurization ofthe barrier fluid and compensation ofleakage). The SBF range is availablein 3 basic versions: SBF1000: tankcapacity 40 l, flow rate 6 l/min.SBF2000: tank capacity 100 l, flow rate12 l/min.SBF3000: tank capacity 100 l, flow rate23 l/min.The three BFS ranges are designedfor hydraulic oil with viscosity values of12 to 90 mm2/s at operatingtemperature (tank temperature). Theoptimum viscosity of the class of the oilto be used has to be determinedseparately in accordance with therespective application