GEM 520 Installation, Operating And Maintenance Instructions page 22

WARNING
Corrosive chemicals!
® Risk of caustic burns!
Wear appropriate protective
G
gear when installing.
CAUTION
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.
CAUTION
Do not exceed the maximum
permissible pressure!
® Take precautionary measures to
avoid possible pressure surges
(water hammer).
Installation work must only be performed
G
by trained personnel.
Use appropriate protective gear as
G
specifi ed in plant operator's guidelines.
Installation location:
CAUTION
Do not apply external force to the valve.
G
Choose the installation location so that
G
the valve cannot be used as a foothold
(climbing aid).
Lay the pipeline so that the valve body
G
is protected against transverse and
bending forces, and also vibrations and
tension.
Only mount the valve between
G
matching aligned pipes.
Mounting position:

For valves with a regulating cone we
recommend to mount the actuator
vertically upright or vertically down to
optimise the service life.
520
Direction of the working medium:

Flow direction:
under the seat
The fl ow direction is indicated by an
arrow on the valve body:
under the seat
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 plant or plant component.
3. Secure against recommissioning.
4. Depressurize the plant or plant component.
5. 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.
Flange connection:
Install the valve in the condition it is
delivered in:
1. Pay attention to clean, undamaged sealing
surfaces on the mating fl anges.
2. Align fl anges carefully before installing them.
3. Centre the seals accurately.
4. Use all fl ange holes.
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