Working Conditions of DY41 mechancal shaft seals: it can be used in water pumps,fuel pumps,weakly corrosive pumps and the temperature and the pressure and the seal shaft speed is listed as follows: Mediums:Water, oil and weakly-corrosive mediums,Temperature:-20oC~150oC, Pressure: ≤1Mpa, Speed: ≤ 12 m/Sec . Ceramic, silicon carbide/sic,tungsten carbide(TC) act as both seal mating rings and seal faces and carbon acts only as the seal faces.