Patent ID: 6142476
Filing Date: 2000-11-07
Classification: F16J

Abstract:
A mechanical seal assembly in which balance factors can be established separately and freely for two fluids opposed at a sealing face of said mechanical seal assembly, said mechanical seal assembly comprising:a casing having an inwardly extending radial flange;a rotatable shaft extending into said casing;a seal ring supported by said casing and disposed about said shaft, said seal ring having a radial end face;a mating ring disposed about said shaft and having a radial end face, wherein said radial end face of said seal ring and said radial end face of said mating ring are disposed in an opposed sealing relation so as to define the sealing face;a first seal packing provided on an outer peripheral surface of said seal ring, wherein said first seal packing is supported in an axial direction only by said radial flange, and said radial flange is disposed on a side of said first seal packing which is opposite relative to a sealed fluid side of said first seal packing; anda second seal packing, axially spaced from said first seal packing, provided on the outer peripheral surface of said seal rings,wherein said first seal Packing and said second seal packing are disposed in different radial positions so as to define two separate balance factors.