Commissioning, Operation - WIKA 7 Serie Manual De Instrucciones

6. Commissioning, operation

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 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 clamp
socket or union nut should be used. When a blow-out device is fitted to an instru-
ment, 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
„
commissioning!
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, instru-
„
ments with blow-out device or blow-out back must keep a minimum distance of
20 mm from each object.
Permissible ambient and operating temperatures
When mounting the instrument it must be ensured that, taking into consideration
the influence of convection and heat radiation, no deviation above or below the
permissible ambient and media temperatures can occur. The influence of temper-
ature on the indication accuracy must be observed.
WIKA operating instructions pressure gauge model 7 per ATEX
Spanner flats
Sealing face

Sealing in the
thread

EN
13