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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: PTFE. Springs: Inconel 718 hardened, Hastelloy. Metal parts: CrNiMo steel, Duplex, Carpenter 42, Hastelloy, SS 316. For unstepped shafts. Single Seal. Balanced. Semi Cartridge Seal. Independent of direction of rotation. Metal bellows rotating. For extreme high temperature ranges. No dynamically loaded O-Ring. Self cleaning effect. Pumping screw for highly viscous media available. Process industry Refining technology Power plant technology Chemical industry Hot media Cold media Highly viscous media Pumps Special rotating equipment.