WIKA 232.30 User Manual

Pressure gauges

Examples:

Operating
instructions

GB

1. Safety

WARNING!

Before installation, commission­ing and operation, ensure that the
appropriate pressure gauge has been
selected in terms of measuring range,

design and suitable wetted material (corrosion)

for the specic measuring conditions. In order to

guarantee the measuring accuracy and long-term

stability specied, the corresponding load limits

must be observed.

against being blocked by debris and dirt. With
safety pressure gauges (see dial
must be ensured that the free space

symbol k) it

behind the

blow-out back is at least 15 mm.

After mounting, set the compen­sating valve (if available) from

CLOSE to OPEN.

With models 4 and 7, do not open the ange

mounting screws.

Requirements for the installation point

Model 732.14,

overpressure safety

up to 400 bar

Model 213.40

Model 432.56,

overpressure safety

up to 100 bar

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,

EN 837-2 Selection and installation recommendations

EN 837-3 Diaphragm and capsule pressure gauges,

metrology, requirements and testing

for pressure gauges

dimensions, metrology, requirements and
testing

Specications: see data sheet on www.wika.de

Subject to technical modications.

© WIKA Alexander Wiegand SE & Co. KG 2009

WIKA Alexander Wiegand SE & Co. KG

Alexander-Wiegand-Straße 30
63911 Klingenberg/Germany
Tel. [phone]
Fax [phone]
[e-mail]
www.wika.de

Only qualied persons authorised by the plant

manager are permitted to install, maintain and
service the pressure gauges.

For hazardous media such as oxygen, acetylene,
ammable or toxic gases or liquids, and refrigera­tion plants, compressors, etc., in addition to all
standard regulations, the appropriate existing
codes or regulations must also be followed.

After an external re, 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 regula­tions 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 ats

provided for this purpose (using a suitable tool).

Mounting with
spanner

Correct sealing of pressure gauge connections
with parallel threads  must be made using

suitable sealing rings, sealing washers or WIKA
prole 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).

Spanner ats

Sealing face



The torque depends on the seal used. Connect­ing 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

tted to a pressure gauge, it must be protected

2408976.04 11/2013

Sealing by
the thread



If the line to the gauge is not suciently rigid for

vibration-free mounting, a pipe-support bracket
should be used to secure it (possibly via a

exible capillary). If vibration cannot be prevented
through suitable installation, liquid-lled gauges

should be used. The instruments should be
protected against coarse dirt and wide uctua­tions 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 inu­ence of convection and heat radiation, no devia­tion above or below the permissible ambient and

medium temperatures can occur. The inuence

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 qualied 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 sucient precaution­ary measures.