As shown in the figure, a stainless steel flange rubber soft joint with PTFE lining appears PTFE deformation in the process of debugging after installation by customers, and it is smooth before shipment, and the thickness of PTFE lining is 2mm, with a certain radian outside. In natural state, PTFE itself can not be deformed into this state, only PTFE is subjected to it. As for where this force comes from, tetrafluoride itself does not have such force. Then, this situation is caused by vacuum negative pressure inside the pipeline. During the commissioning of the pipeline, the medium inside the pipeline is insufficient, resulting in negative pressure inside the pipeline, which will absorb the lining of tetrafluoride flat. The situation shown above only solves the vacuum negative pressure inside the pipeline. The problem will solve the problem of rubber soft joints being flattened, because rubber soft joints are soft joints, not hard joints.
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