| 摘要 |
<p>The invention relates to a double-seated valve for use especially in aseptic applications, comprising at least two pipe connectors (3, 4, 7) between whic h two annular valve seats (11, 12) are positioned coaxially in relation to eac h other and in series. Said double-seated valve also comprises two closing elements (8, 9) which can be axially displaced independently of each other a nd when closed cooperate with the valve seats (11, 12) in a sealing manner and enclose a hollow chamber (34) between each other, as well as at least one cleaning connector (35, 36) leading into said hollow chamber (34) for introducing a cleaning medium. To avoid the disadvantages of a non-aerodynam ic leakage chamber the invention provides for the two end sections (22, 23) of an elastic sealing element (21) embodied as a ring-shaped single piece to be attached in a sealing manner to the two closing elements (8, 9). A sealing surface (25, 26) is embodied adjoining to each end section (22, 23), which sealing surface can be pressed against the corresponding valve seat (11, 12) by means of a closing element (8, 9). The sealing element (21) has a section of rolling diaphragm (24) which connects the two end sections (22, 23) to ea ch other and defines the hollow chamber (34).</p> |
