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3. Safety
3.5 Markings
For the operation of each diaphragm seal system, it must be ensured that the permissi-
ble pressure/temperature rating is maintained depending on the components used, their
materials and the system fill fluid. This results in either the maximum process temperature
for the respective process being defined by the maximum allowable pressure PS, or the
maximum process pressure being defined by the maximum permissible temperature TS.
Thus, the pressure-temperature diagram in the data sheet, together with the applicable
standards and Technical information IN 00.25, with respect to the system fill fluid, must be
observed.
Marking
Line
Pos.
1
1
1
2
2
1
Example of
Marking
Line
Pos.
1
1
1
2
2
1
3
1
3
2
3
3
1) Per European pressure equipment directive
WIKA additional operating instructions for diaphragm seal, model 990.45
All manuals and user guides at all-guidesbox.com
Designation
WIKA
Serial number
Diaphragm seal model
Designation
Standard of process connection
Size of the process connection + nominal pressure rating
Material data for upper body of diaphragm seal
Material data for diaphragm
Maximum permissible temperature TS
Maximum allowable pressure PS
1)
1)
EN
7
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