Apparatus and method for filter seal
    53.
    发明授权
    Apparatus and method for filter seal 失效
    滤纸密封的装置和方法

    公开(公告)号:US3899426A

    公开(公告)日:1975-08-12

    申请号:US47152074

    申请日:1974-05-20

    Inventor: HIRS GENE

    CPC classification number: B01D29/096 B01D2201/34 B01D2201/345

    Abstract: A pressure filter having fixed, vertically spaced upper and lower frame members includes a seal assembly between the filter frames for preventing the escape of pressurized contaminated liquid. The seal is comprised of a vertically displaceable sealing gasket which is biased upwardly by a plurality of tension springs interconnected between the gasket and the upper frame member. The displaceable gasket is urged downwardly against the lower frame member for sealing purposes during filtration flow by an expansible tube which is retained between the upper frame member and the gasket. The expansible tube in the preferred embodiment is unattached to either the upper frame or the displaceable gasket for purposes of economy in construction, yet a liquid-tight seal is maintained at the regions where the tube contacts the upper frame member and the displaceable gasket. When it becomes necessary to change a filter medium, the pressure inflating the tube is relieved and the displaceable gasket is raised by the tension springs to expose the contaminated medium.

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