Seats
Carbon
Graphite has good corrosion resistance, high thermal conductivity and low friction, good self-lubrication and lower expansion. It can be used to make seal faces, bearings and so forth. It is ideal to use it as a frictional mating ring.
Ceramic
Ceramic seal faces are resistant to high-temperatures, corrosion, wearing and have good sealing properties. They are widely used in spacecraft, machinery, metallurgy, printing and dyeing, foodstuff, pharmaceutical, auto industry and so forth.
Silicon
Silicon has excellent corrosion resistance, high mechanical strength, high thermal conductivity and good self-lubrication. They are used as seal faces, bearings and tubes in spacecraft, machinery, metallurgy, printing and dyeing, foodstuff, pharmaceutical, auto industry and so forth. When these faces are combined with graphite faces, friction is at a minimal.
Tungsten
Tungsten carbide is widely used as seal faces with high wear resistance, high fractural strength, high thermal conductivity and low heat expansion co-efficient. It is a durable material that resists heat and fracturing.
