16
4 Mounting
VEGADIF 85 • Profibus PA
53569-EN-230814
Note:
Follow the mounting instructions of the respective manufacturer and
seal the thread, e.g. with PTFE tape.
Valve blocks are used for initial shut-off when connecting the differ
-
ential pressure transmitter to the process. They are also used for pres
-
sure compensation of the measuring chambers during adjustment.
3-fold and 5-fold valve blocks are available (see chapter "
Mounting
and connection instructions
").
Free openings on the process assembly must be closed by ventilation
valves or closing screws. Required torque see chapter "
Technical
data
".
Note:
Use the supplied parts and seal the thread with four layers of PTFE
tape.
4.4 Mounting and connection instructions
When connecting VEGADIF 85 to the measuring point, take note of
the high/low pressure side of the process component.
1)
.
The "
H
" identifies the high pressure side, the low pressure side due
to an "
L
" on the process component next to the oval flanges.
Note:
The static pressure is measured on the low pressure side "
L
".
2
1
H L
Fig. 8: Marking for high/low pressure side on the process component
1 H = High pressure side
2 L = Low pressure side
Valve blocks
Ventilation valves, closing
screws
Connection high/low
pressure side
1)
The pressure effective on "H" is considered as positive, the pressure effec
-
tive on "L" as negative in the calculation of the pressure difference.