Patent ID: 6056003
Filing Date: 2000-05-02
Classification: F16K,Y10T

Abstract:
A double-seat valve, particularly for aseptic applications, having at least two line connections (3, 4, 7), between which two annular valve seats (11, 12) are disposed coaxially with one another and in series, having two valve closers (8, 9), which are axially closable independently of one another and which in the closed state cooperate sealingly with the valve seats (11, 12) and between them is an enclosed hollow chamber (34), and having at least one cleaning connection (35, 36), discharging into the hollow chamber (34), for introducing a cleaning medium therein, characterized in that a one-piece, annularly encompassingly designed elastic sealing element (21) is secured sealingly in each case by its two end portions (22, 23) to the two closers (8, 9), with a sealing face (25, 26) embodied adjacent to each end portion (22, 23), each sealing face being pressable by said closers (8, 9) against its associated valve seat (11, 12), and that the sealing element (21) has a roller diaphragm portion (24), which connects the two end portions (22, 23) to one another for sealing along said valve seats (11,12) at said end portions (22,23) and defining the hollow chamber (34) to clean along said said valve seats (11,12) between said end portions (22,23).