... , Assurable quality, Authentic reputation 2010, 2012 series mechanical seal (double seal, shaft seal) 2010, 2012 series middle pressure mechanical seal (double seal ... , Velocity3m/s. Under high temperature, Cooling jacket is needed, the total heigh will be 100mm higher.Type 2012 is also suitable ... . Under temperature 100, Cooling jacket is not needed. 2010, 2012 series middle pressure mechanical seal