WIKA 232.30 - Manual

WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg/Germany
Tel. +49 9372 132-0
Fax +49 9372 132-406
[email protected]
www.wika.de 2408976.04 11/2013
Operating
instructions
1. Safety
WARNING!
Before installation, commission-
ing and operation, ensure that the
appropriate pressure gauge has been
selected in terms of measuring range,
design and suitable wetted material (corrosion)
for the specific measuring conditions. In order to
guarantee the measuring accuracy and long-term
stability specified, the corresponding load limits
must be observed.
Only qualified persons authorised by the plant
manager are permitted to install, maintain and
service the pressure gauges.
For hazardous media such as oxygen, acetylene,
flammable or toxic gases or liquids, and refrigera-
tion plants, compressors, etc., in addition to all
standard regulations, the appropriate existing
codes or regulations must also be followed.
After an external fire, pressure media can leak
out, particularly at soft solder joints. All gauges
must be checked and, if necessary, replaced
before recommissioning the plant.
Non-observance of the respective regulations
can result in serious injury and/or damage to
equipment.
2. Mechanical connection
In accordance with the general technical regula-
tions for pressure gauges (e.g. EN 837-2). When
screwing the gauges in the force required for this
must not be applied through the case or termi-
nal box, rather only through the spanner flats
provided for this purpose (using a suitable tool).
Correct sealing of pressure gauge connections
with parallel threads  must be made using
suitable sealing rings, sealing washers or WIKA
profile seals. The sealing of tapered threads (e.g.
NPT threads) is made by providing the thread
 with additional sealing material such as, for
example, PTFE tape (EN 837-2).
Sealing by
the thread

Spanner flats
Sealing face 
Examples:
Model 213.40
Model 732.14,
overpressure safety
up to 400 bar
Model 432.56,
overpressure safety
up to 100 bar
Pressure gauges
Notes in accordance with Pressure Equipment
Directive 97/23/EC
„ The pressure gauges are "pressure accessories"
in accordance with Article 1, Paragraph 2.1.4
„ The volume of the pressure bearing housings of
WIKA pressure gauges is < 0.1 L
„ The pressure gauges carry CE marking for Fluid
Group 1G in accordance with Annex 2, Table 1
when their permissible working pressure
exceeds 200 bar
Pressure gauges that do not carry the CE mark
are manufactured in accordance with Article 3,
Paragraph 3 "Sound engineering practice".
Applied standards
EN 837-1 Bourdon tube pressure gauges, dimensions,
metrology, requirements and testing
EN 837-2 Selection and installation recommendations
for pressure gauges
EN 837-3 Diaphragm and capsule pressure gauges,
dimensions, metrology, requirements and
testing
Specifications: see data sheet on www.wika.de
Subject to technical modifications.
© WIKA Alexander Wiegand SE & Co. KG 2009
GB
The torque depends on the seal used. Connect-
ing the gauge using a clamp socket or a union nut
is recommended, so that it is easier to orientate
the gauge correctly. When a blow-out device is
fitted to a pressure gauge, it must be protected
against being blocked by debris and dirt. With
safety pressure gauges (see dial symbol k) it
must be ensured that the free space behind the
blow-out back is at least 15 mm.
After mounting, set the compen-
sating valve (if available) from
CLOSE to OPEN.
With models 4 and 7, do not open the flange
mounting screws.
Requirements for the installation point
If the line to the gauge is not sufficiently rigid for
vibration-free mounting, a pipe-support bracket
should be used to secure it (possibly via a
flexible capillary). If vibration cannot be prevented
through suitable installation, liquid-filled gauges
should be used. The instruments should be
protected against coarse dirt and wide fluctua-
tions in ambient temperature.
Note for model 732.14 for front bezel mounting:
The front bezel serves as centring and as the
aperture in the mounting panel.
Securing and thus the weight-bearing must be
made via the pressure connection piping.
3. Permissible ambient and operating
temperatures
When mounting the pressure gauge it must be
ensured that, taking into consideration the influ-
ence of convection and heat radiation, no devia-
tion above or below the permissible ambient and
medium temperatures can occur. The influence
of temperature on the display accuracy must be
observed.
4. Storage
The pressure gauge should be kept in its original
packing until installation. The gauge should be
protected from external damage during storage.
Storage temperature range: -40 ... +70 °C.
Protect the gauges from humidity and dust.
5. Maintenance and repairs
The instruments are maintenance-free. Checks
should be carried out on a regular basis to ensure
the measuring accuracy of the pressure gauge.
The checks or recalibrations must be carried out
by qualified skilled personnel with the appropriate
equipment.
When dismounting, close the compensating valve
(if available).
WARNING!
Residual media in dismounted
pressure gauges can result in a risk
to personnel, the environment and
equipment. Take sufficient precaution-
ary measures.
Mounting with
spanner