WIKA 4x2.30.1x0 Series, Operating Instructions Manual

Page: 12 / 32

WIKA operating instructions pressure gauge, model 4 per ATEX 12
2080276.08 08/2019 EN/DE
EN
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 LH-RH union or union nut should
be used. When a blow-out device is fitted to a instrument, it must be protected against being
blocked by debris and dirt.
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, instruments with liquid filling should be used. The instruments should be
protected against coarse dirt and wide fluctuations in ambient temperature.
Installation
„
Nominal position per EN 837-3 / 9.6.6 c (
⊥
)
„
Process connection lower mount
„
For filled versions, it must be ensured that a case filling which escapes in the event of
a fault cannot reach system parts whose surface temperature exceeds the maximum
permissible medium temperature of the instrument.
„
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, instruments 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 influ -
ence of convection and heat radiation, no deviation above or below the permissible ambient
and media temperatures can occur. The influence of temperature on the indication accuracy
must be observed.
Sealing in the
thread 
Spanner flats
Sealing face 
6. Commissioning, operation