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Reverse Balanced Mechanical Seal:
Reverse balanced mechanical Seal which is called shortly RB seals are assembled outside of the pressurized area. Because of less contact of pumping medium on the face of the seal, the rpm of the shaft should be very less enable to reduce the face friction temperature. Due to these drawbacks, we can use these types of seals only in agitator/mixture/blender machine shafts with low rpm from 1rpm to 300rpm. In some special cases, we can use the same seal at higher rpm with the support of external coolant.