| 摘要 |
The invention relates to different examples for producing a filter valve combination for a sterilizing container. This filter valve construction permits the use of any filter in the shape of flat filters, membrane filters or volume filters having pores with a fineness according to choice. The invention is especially provided with finely porous filters which guarantee a sterilization of the container contents also after long storage periods. Such filters cannot compensate the pressure differences in the sterilizer very quickly, said differences being produced relatively fast, thus resulting in the possibility of damage to the container. For this reason, the invention provides pressure compensation valves in both directions, i.e. from inside to outside and from outside to inside. Said valves guarantee a quick reduction of the pressure differences during the sterilizing process, however, they durably seal the container during the successive storage. The filter valve combination is preferably arranged in an immovably fixed manner on a container opening, for example, on an intermediate cover or in a container wall such that it does not come in contact with the container contents. The valve arrangement can be arranged in a holding frame surrounding the filter, said frame being braced with the edge of the container opening. Different production examples, especially with lip seals, are provided which interact with valve seat surfaces in circular arc-shaped chambers of the holding frame. The valve seat surfaces are preferably placed in valves in the holding frame which operate in both directions. It is possible, however, to provide a spatial separation during construction of the outlet valve as a condensate bleeder. |
