... 2. Speed: 0~5000rpm. 3. Temperature: - 40oC ~ +150oC. Ceramic, Carbon Water pump seal, shaft seal HFSB:Operating Parameters:Pressure: 0 ... : - 40oC ~ +150oC.Materials:Rotary ring: Ceramic /SIC /TCStationary ring: Carbon /SIC /TCSecondary seal: (HNBR) NBR /EPDM /VITONSpring & other parts: ... with ISO quality management system standardMarket Share: Ceramic, Carbon Water pump seal, shaft seal HFSB