Product Description Single Unbalanced Mechanical Seal Item No.: OY-FBD Operating Conditions: Pressure: Up to 25bar or 360psi Speed: Up to 16m/s or 52ft/s Temperature: -40 to 200 centigrade degree (depending on materials used) Material: Seal face/Primary ring: Carbon graphite, Silicon carbide, Tungsten carbide. Seat/Mating ring: Alumina ceramic, Silicon carbide, Tungsten carbide. Secondary seals: NBR, Viton, EPDM, Silicone. Spring and others: SUS304, SUS316, etc Shaft Size: 16mm to 120mm