| 摘要 |
A sample extraction system is provided, comprising a block fitting including an inlet, an outlet, an interior passagway providing communication between the inlet and the outlet thereby allowing flow through the block fitting, a venturi section positioned in the interior passageway, a sample port, a sample passageway connecting the interior passageway and the sample port between the inlet and the venturi section, a re-entry port, and a re-entry passageway connecting the re-entry port and the venturi section; a loop entry line, connected on one end to a main flow line, and on the other end to the inlet of the block fitting; a loop exit line, connected on one end to the main flow line, and on the other end to the outlet of the block fitting; a sample container, having an inlet and an outlet; a sample inlet line, connected on one end to the sample port, and on the other end to the inlet of the sample container; at least one sample inlet valve, positioned in the sample inlet line; a sample exit line, connected on one end to the outlet of the sample container, and on the other end to the re-entry port; and at least one sample exit valve, positioned in the sample exit line.
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