1. material: PTFE, SS, ceramic 2. termperature: -20-120C 3. press in chamber: <1.0Mpa 4. linear velocity: <15m/s Standard BIA water Mechanical Seal 1. Mostly use: oil, water, and other low corrosion liquids 2. stationary ring: ceramic, SIC, TC 3. rotary: carbob, SIC, TC 4. secondary seal: NBR, EPDM, VITON 5. spring and other parts: SUS304, SUS316