These seals are specifically purposed for the fluids containing solid particles or with high viscosity , springs are also specially developed so that they will not get chocked up due to slurry powder. Combination faces with smooth lapping for no leakage, special elastomeric seal rings and “O” rings provides great support for the smooth running of seal for a long time. It is used for sewage plant, slurry, paper, pulp, sugar and effluents with solids.