The JM-89(J) series of mechanical seal belongs to the derivative series of the JM-8(J) series. The seal’s connection size meets DIN24960 and CG865556 standards,and is suitable for centrifugal pumps and other rotating shaft equipment according to DIN24960 and GB6556. This series of sealing structure is compact. It adopts the matching structure of the whole rotating end face and the whole graphite static ring to eliminate the effect of temperature gradient and achieve low leakage emissions. JM-89(J) series of seal is a type specially designed for high viscosity oil medium, suitable for various oil medium such as lubricating oil, refrigerator oil,turbine oil, etc.