WIKA ISO 9001 Mode D'emploi page 15

5. Commissioning, operation
5.3 Mounting instructions for diaphragm seal systems with EHEDG and 3-A
Observe the following instructions, especially for EHEDG certified and 3-A conform instru-
ments.
To maintain the EHEDG certification, one of the EHEDG-recommended process connec-
■
tions must be used. These are marked with the logo in the data sheet.
To maintain the conformity to the 3-A standard, a 3-A conform process connection must
■
be used. These are marked with the logo in the data sheet.
Mount the diaphragm seal system with minimal dead space and able to be cleaned easily.
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The mounting position of the diaphragm seal system, welding socket and instrumentation
■
T-piece should be designed to be self-draining.
The mounting position must not form a draining point or cause a basin to be formed.
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With the process connection via an instrumentation T-piece, the branch L of the T-piece
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must not be longer than the diameter D of the T-piece (L ≤ D).
Special instructions for in-line versions
In-line diaphragm seals, in-line access units (e.g. NEUMO BioControl
■
and instrumentation T-pieces in horizontal pipes should be installed with a slight pipe
inclination for self-draining.
With in-line access units (e.g. NEUMO BioControl
■
seals from the manufacturer and observe their installation instructions.
WIKA operating instructions, diaphragm seal systems
®
or VARINLINE ), use the original
® ®
or VARINLINE )
®
15
EN