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Shaft diameter: 22 … 150 mm. Pressure: Up to 22 bar (dependent on shaft diameter and sliding materials) Temperature: -50 °C … +220 °C Seal ring: Carbon graphite resin impregnated, Carbon graphite antimony impregnated, Silicon carbide. Mating ring: Silicon carbide, Tungsten carbide, Ceramic. Secondary seals: TTV, TCV, FKM, EPDM, Aflas, Kalrez, FEP. Springs: SS 316, Hastelloy C. Metal parts: SS 316, other materials on request. Single & Dual seal. Balanced and Unbalanced Seals. Independent of direction of rotation. Standard version with V-grooves, U-grooves optional (independent of direction of rotation). Gas-lubricate. Contact free operation. Face-to-face. Cartridge unit. Does not open in the event of buffer pressure failure. Self closing at pressure reversal. No additional complex components to dissipate frictional heat. Chemical industry. Process industry. Agitators, mixers. Refining technology. Gases and liquids. Blowers. Pumps.