Operating conditions: Temperature: -20°C to +120°C; Pressure: ≤1.OMPa; Speed: ≤15m/s. Fixed seat: CWCT20. Materials: Rotating ring: Carbon/SiC/TC; Stationary ring: 99%Ceramic/SiC/TC; O-ring: VITON,NBR,EPDM; Spring and metal parts: SUS304/SUS316.