Sliding rings for liquid-lubricated mechanical seals and gas seals in pumps, stirrers, mills, compressors, turbines and desulfurization plants. Primary shaft seals in naval construction and shaft seals in the gas- and oil extraction.
SSiC, SiSiC, Al2O3 and Si3N4
high chemical corrosion resistance
high temperature resistance
high thermal conductivity i.e. rapid dissipation of process heat
low density, i.e. small mass moment of inertia
high wear resistance due to high strength and hardness
good tribological properties
Sintered silicon carbide is the most common material for liquid-lubricated mechanical seals due to its excellent chemical resistance and thermal conductivity. For high-speed gas seals the preferred material is silicon nitride with highest strength and wear resistance.