FeaturesSingle sealBalancedIndependent of direction of rotationMultiple springs stationarySeat rotatingSeat arranged directly behind the impellerSpring protection sleeveVariant with cylindrical spring and acc. EN 12756 (HRZ1) availableVariant as cartridge with/without guide sleeve for application with/without quench (HR2, HR3)Dual seal as cartridge unit (HRKS-D) availableAdvantagesEspecially for application in solids containing media without external flush or internal product circulation. Solids content 40 % (single seal) and 60 % (double seal)Operation under vacuum without seat locking possiblePumping screw for increased circulation availableSprings are protected from product and leakageOperating rangeShaft diameter:dN = 36 ... 270 mm (1.4" ... 10.63")Pressure: p1* = 16 bar (230 PSI)Temperature:t = -20 °C ... +160 °C (-4 °F ... +320 °F)Sliding velocity: vg = 10 m/s (33 ft/s)* For operation under vacuum it is necessary to arrange for quenching on the atmosphere side.MaterialsSeal face: Silicon carbide (Q1, Q2)Seat: Silicon carbide (Q1, Q2)Recommended applicationsProcess industryOil and gas industryRefining technologyChemical industryPower plant technologyPulp and paper industryWater and waste water technologyMining industrySugar industryCement industryContaminated, abrasive and solids containing mediaSewage water pumpsDredger pumpsOil sand extractionSuspension pumps of flue-gas desulphurization plants (FGD)ServiceProvide special designAccording to the requirements and conditions for the custom processing
