... mechanical seal (double seal, shaft seal) 2010, 2012 series middle pressure mechanical seal (double seal, shaft seal)Type 2010 is suitable ... Working pressure4.0MPa, cavity temperature80, Velocity3m/s. Under high temperature, Cooling jacket is needed, the total heigh will be 100mm higher ... Working pressure6.4MPa, medium temperature200, Velocity3m/s. Under temperature 100, Cooling jacket is not needed.