GEA D-tec D, Operating Instruction

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2 Safety
2.1 Intended use
Aseptic double-chamber valves are mix-proof stroke valves for highly hygienic
and aseptic process systems and permit the safe separation of incompatible
media. The media separation is done via the integrated sterile chamber (ISB),
which is separated hermetically from the atmosphere with a seal each to both
product lines and via two side valves (inlet and outlet).
For safe operation, it is mandatory that the following points are observed in the
different process steps:
Transfer
During a media transfer through the main valve both side valves must be closed
completely.
Fig.1: Product transfer
Cleaning sterile chamber
After a media transfer the sterile chamber must be flushed at least with one
sterile medium. After the main valve has been closed, both side valves can be
put in the open position and thus permit the flushing of the sterile chamber.
Fig.2: Rinsing / sterilisation after transfer
CIP cleaning with seat lift
If seat lifting is activated for a CIP cleaning (preferably in cycles) no process must
be running in the opposite line. Furthermore, the outlet valve of the sterile
chamber to drain the CIP medium must be open.
Safety
Intended use
430BAL013307EN_8
8 04.08.2022