[Process Engineering Division – Pipeline and Valve Technology Exchange Forum – Daily Question – Questions 03–18]

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【Process Engineering Division – Pipeline and Valve Technology Exchange Forum – Daily Question – Questions 03–18】What quality requirements must be met when disassembling a new valve for inspection? (1) The valve seat must be firmly bonded to the valve body; (2) The valve core must fit well with the valve seat, and the valve cover must also fit well with the valve body, with no defects present; (3) The connection between the valve stem and the valve core must be flexible and reliable; (4) The valve stem must not be bent or corroded, and it must fit properly with the packing gland; (5) Gaskets, packing, bolts, etc. must be complete and free of defects. Note: Questions are valid only on the day they are posted (3 correct answers and 1 wrong answer; posts filled with irrelevant content will be deleted). Replying to old posts on a large scale is considered posting spam, and such responses will not earn any points or may be scored at the discretion of the organizers.