| 摘要 |
A primary object of the present invention is to achieve a high sealing performance, to collect hazardous gas contained in a sealed process fluid, and to realize an easy disposition of a mechanical seal device. A typical configuration is that the end face of a shaft sleeve engages a rotary shaft by a step shoulder of the shaft which is disposed in the sealed fluid side relative to the stationary seal ring, and that the inner diameter of the end face is set larger than the inner diameter of the sealed fluid pressure surface on the back face of the stationary seal ring. This construction makes it easy to dispose a mechanical seal device and with this mechanical seal device, the sealed process fluid is securely sealed.
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