Patent ID: 6918593
Filing Date: 2005-07-19
Classification: F16J

Abstract:
1. A mechanical seal device for providing a seal against a sealed process fluid, said mechanical seal device comprising: 1) a seal cover being disposed at the end face of a housing and retaining a mounting face; 2) a first diaphragm being of an annular form and retaining a fixing section and a retaining section, said fixing section being mounted on said mounting face of said seal cover, said retaining section being located on the other side relative to said fixing section; 3) a stationary seal ring being sealingly retained by said retaining section of said first diaphragm and having a seal face at one end; 4) a rotary seal ring having an opposing seal face, said opposing seal face being in a sealing contact relative to said seal face of said stationary seal ring; 5) a second diaphragm being of an annular form and being shaped and dimensioned in more or less an identical manner relative to said first diaphragm and retaining a retaining section and a fixing section, said fixing section being joined with a rotary shaft, 6) a first pressure receiving groove defined by said fixing section and said retaining section of said first diaphragm, and a clutch ring disposed between said first diaphragm and said rotary shaft, 7) a second pressure receiving groove defined by said fixing section and said retaining section of said second diaphragm, and a sleeve disposed between said second diaphragm and said rotary shaft, and 8) a fluid passage guiding said sealed process fluid into said first pressure receiving groove and said second pressure receiving groove.