Installation And Operation; Installing The Diaphragm Valve - GEM 611 Manual

10 Installation and operation

Prior to installation:
Ensure that valve body and diaphragm
G
material are appropriate and compatible
to handle the working medium.
Check the suitability prior to the
G
installation.
See chapter 5 "Technical data".
10.1 Installing the
diaphragm valve
WARNING
The equipment is subject to
pressure!
® Risk of severe injury or death!
Only work on depressurized
G
plant.
WARNING
Corrosive chemicals!
® Risk of caustic burns!
Wear appropriate protective
G
gear when installing.
WARNING
Hot plant components!
® Risk of burns!
Only work on plant that has
G
cooled down.
CAUTION
Never use the valve as a step or an aid
for climbing!
® This entails the risk of slipping-off or
damaging the valve.
WARNING
Do not exceed the maximum
permissible pressure!
® Take precautionary measures to avoid
possible pressure surges
(water hammer).
611, 671_us
Installation work may only be performed
G
by trained personnel.
Use appropriate protective gear as
G
specifi ed in plant operator's guidelines.
Installation location:
Do not apply external force to the valve.
G
Choose the installation location so that
G
the valve cannot be used as a foothold.
Lay the pipeline so that the valve body is
G
protected against transverse and bending
forces, and also vibrations and tension.
Only mount the valve between
G
matching aligned pipes.
Direction of the working medium: optional.

Mounting position of the valve: optional.

Installation:
1. Ensure the suitability of the valve for
each respective use. The valve must
be appropriate for the piping system
operating conditions (medium, medium
concentration, temperature and
pressure) and the prevailing ambient
conditions. Check the technical data of
the valve and the materials.
2. Shut off pressure line or process line.
3. Secure against re-commissioning.
4. WARNING Depressurize the plant or
plant component.
5. WARNING Completely drain the plant
(or plant component) and let it cool down
until the temperature is below the media
vaporization temperature and scalding
can be ruled out.
6. Correctly decontaminate, rinse and
ventilate the plant or plant component.
Installation - Butt weld spigots:
1. Adhere to good welding practices!
2. Remove the bonnet with the diaphragm
before welding the valve body into the
pipeline (see chapter 11.1).
3. Allow butt weld spigots to cool down.
4. Reassemble the valve body and the
bonnet with diaphragm (see chapter 11.4).
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CAUTION