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Shaft diameter: 20 … 100 mm Pressure: 25 bar (Max) Temperature: -40 °C … +350 °C Seal ring: Carbon graphite Antimony impregnated, Silicon carbide. Mating ring: Silicon carbide. Tungsten carbide. Secondary seals: Grafoil. Springs: Inconel 718 hardened, Hastelloy. Metal parts: CrNiMo steel, Duplex, Carpenter 42, Hastelloy, SS 316. For Unstepped shafts. Single seal. Balance. Independent of direction of rotation. Encapsulated rotating spring. For extreme high temperature ranges. No dynamically loaded O-Ring. Self cleaning effect. Short installation length possible. Pumping screw for highly viscous media available. Process industry. Oil and gas industry. Refining technology. Petrochemical industry. Chemical industry. Pulp and paper industry. Hot media. Highly viscous media. Pumps Special rotating equipment.