Stationary Ring(ceramic/SIC/TC Rotary Ring(Carbon/SIC/TC) Secondary Seal(NBR/EPDM/Viton/silica Gel) Spring and metal parts Mechanical Seals Working Conditions: Mediums: Oil, light hydrocarbon, aromatic hydrocarbon, organic solvents, weak acids, alkali, Ammonia, etc. Temperature: -75oC~400oC Pressure: ≤ 2.0Mpa(Single) ≤ 6.0Mpa(Double) Speed: ≤ 23m/Sec Combined Materials: