WIKA PGT23.100 Mode D'emploi page 15

5. Commissioning, operation
When screwing the instruments in, the force required for sealing must not be applied through
the case, but only through the spanner flats provided for this purpose, and using a suitable
tool.
For parallel threads, use flat gaskets, lens-type sealing rings or WIKA profile sealings at the
sealing face . With tapered threads (e.g. NPT threads), sealing is made in the threads ,
using a suitable sealing material (EN 837-2).
The tightening torque depends on the sealing used. In order to orientate the measuring
instrument so that it can be read as well as possible, a connection with LH-RH union or
union nut should be used. When a blow-out device is fitted to an instrument, it must be
protected against being blocked by debris and dirt.
Installation
Nominal position per EN 837-3 / 9.6.6 figure 7: 90° ( ⊥ )
„
Process connection lower mount
„
With filled versions the vent valve at the top of the case must be opened before commis-
„
sioning!
For outdoor applications, the selected installation location has to be suitable for the
„
specified ingress protection, so that the instrument is not exposed to impermissible
weather conditions.
In order to avoid any additional heating, the instruments must not be exposed to direct
„
solar irradiation while in operation!
To ensure that the pressure can be safely vented in the case of failure, due to the
„
blow-out back, a minimum distance of 20 mm from any object must be maintained.
Requirements for the installation point
If the line to the measuring instrument is not adequately stable, an instrument mounting
bracket should be used for fastening. If vibrations cannot be avoided by means of suitable
installation, filled instruments should be used. The instruments should be protected against
coarse dirt and wide fluctuations in ambient temperature.
Pressure gauges with output signal, optionally for hazardous areas
Spanner flats
Sealing face

Installation with open-ended
spanner
Sealing in the thread
EN

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