These type Alfa Level Seal is generally used in hot & cold water pumps, oil pumps refrigiration compressor & fuel injection pumps. MaterialsSeal Faces: Si Carbon Vs Ceramic TC SiSecondary Seals: Viton NitonMetal Parts: SS-304, SS-316 Operating LimitsShaft Dia: 10mm to 100mmPressure: 10 Bars (max)Temperature: -20C to +150C Speed: 2500 rpm (max)