HR

Features Single seal Balanced Independent of direction of rotation Multiple springs stationary Seat rotating Seat arranged directly behind the impeller Spring protection sleeve Variant with cylindrical spring and acc. EN 12756 (HRZ1) available Variant as cartridge with/without guide sleeve for application with/without quench (HR2, HR3) Dual seal as cartridge unit (HRKS-D) available Advantages Especially 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 possible Pumping screw for increased circulation available Springs are protected from product and leakage Operating range Shaft 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. Materials Seal face: Silicon carbide (Q1, Q2) Seat: Silicon carbide (Q1, Q2) Standards and approvals EN 12756 Recommended applications Process industry Oil and gas industry Refining technology Chemical industry Power plant technology Pulp and paper industry Water and waste water technology Mining industry Sugar industry Cement industry Lithium Contaminated, abrasive and solids containing media Sewage water pumps Dredger pumps Oil sand extraction Suspension pumps of flue-gas desulphurization plants (FGD)