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["Est-il nécessaire d补充气体以维持压力吗?", "Si密闭管道或容器内的液体如果带压,在使用泵抽液体时是否需要额外补充压力?例如一段管道内有2公斤的水压,接上泵往外抽水,还需要额外补充气体吗??", "Sel processus,,如果如果连续工作,不是抽真空的话就要“补气”!" "Regarde la combien vous prévoyez de 抽,初始为多少正压,使用泵往外抽之后会降至常压再持续往外抽会变成负压一旦里面的的负压大于泵的抽水压力时里面的的液体就抽不动了。如果需要全部抽完需要开放空口这种带正压的设备抽水正常应该设计有压变通过压变来判断常压或微负压开放空口"

2019-07-14View Original

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密闭管道或容器内的液体如果带压,那么用泵抽液体的时候,是否需要额外补压?比如一段管道,内用2公斤的水压,接上泵往外抽水,还需要额外的补充气体吗?
Reply #22019-07-15
看工艺条件,如果连续工作,不是抽真空的话就要“补气”!
Reply #32019-07-24
看你准备抽多少,一开始2公斤正压,使用泵往外抽之后,会降至常压,再持续往外抽,会变成负压,一旦里面的负压大于泵的抽水压力时,里面的液体就抽不动了。若是需要全部抽完,需要开放空口,这种带正压的设备抽水,正常应该设计有压变,通过压变来断定,常压或微负压开放空口

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