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FeaturesDual sealCartridgeBalancedIndependent of direction of rotationDouble pressure balancedIntegrated pumping deviceVariants available: for eccentric screw pumps (-Vario) and gas-lubricated version (-GSDN)AdvantagesThe series has sliding surfaces that are equipped with EagleBurgmann DiamondFace technology as standardUp to 80 % less energy consumption and minimized heat generation of seal due to friction-reducing DiamondFace layerUp to 100 % extended operating period,Website:http://www.mechanicalsealsuppliers.com, prolongation of MTBF and MTBR intervalsSignificantly improved dry-run capability for inadequately lubricated sealing surfaces, thus vastly improved process safetyUniversally applicable, even with high solids content in the mediumOperating rangeShaft diameter:d1 = 25 ... 100 mm (1.000& quot; ... 4.000& quot;Other sizes on requestTemperature:t= -40 °C ... 220 °C (-40 °F ... 428 °F)(Check O-Ring resistance)Sliding face material combination BQ1Pressure: p1 = 25 bar (363 PSI)Sliding velocity: vg = 16 m/s (52 ft/s)Sliding face material combination Q1Q1 or U2Q1Pressure: p1 = 20 bar (290 PSI)Sliding velocity: vg = 10 m/s (33 ft/s)Barrier fluid circulation system:p3max = 25 bar (363 PSI)Δp (p3 - p1)ideal= 2 ... 3 bar (29 ... 44 PSI),7 bar (102 PSI) for barrier media with poor lubricating properties)Pump startup:Δp (p3 - p1)max = 25 bar (363 PSI) allowedRecommended supply medium: max. ISO VG 5Axial movement: ±1.0 mm, d1 from 75 mm ±1.5 mmMaterialsSeal face product side: Silicon carbide DiamondFace? (Q15)Seat product side: Silicon carbide DiamondFace? (Q15)Seal face atmospheric side: Carbon graphite resin impregnated (B)Seat atmospheric side: Silicon carbide (Q1)Secondary seals: FKM (V), EPDM (E), FFKM (K), Perfluorcarbon rubber/PTFE (U1)Springs: Hastelloy? C-4 (M)Metal parts: CrNiMo steel (G), CrNiMo cast steel (G)Recommended applicationsPetrochemical industryChemical industryPharmaceutical industryPower plant technologyPulp and paper industryMining industryFood and beverage