Instruction manual

Oct 04 Issue H
GV Dry Vacuum Pumps
PAGE
9
9
INSTALLATION
3 INSTALLATION
3.1 Safety
• A suitably trained and supervised technician
must install the pump.
• Ensure that the installation technician is
familiar with the safety procedures which
relate to the products pumped.
• Wear the appropriate safety-clothing when
you come into contact with contaminated
components. Dismantle and clean
contaminated components inside a fume-
cupboard.
• Vent and purge the process system before
you start installation work.
• Check that all of the required components
are available and of the correct type before
you start installation work.
• Disconnect the other components in the
process system from the electrical supply so
that they cannot be operated accidentally.
• Do not allow debris to get into the pump
during installation.
• Do not reuse ‘O’ rings if they are damaged.
• Safely route any electrical supply cables so
that they cannot accidentally trip people.
WARNING
Obey the safety instructions listed
below and take note of appropriate
precautions. If you do not, you can
cause injury to people and damage to
equipment.
3.2 System design
When you design your system, take note of the
following:
• You must be able to isolate the pump from
the atmosphere and from your process
system if you have pumped or produced
dangerous chemicals
• On very dusty applications, incorporate an
inlet filter in the inlet pipeline, to minimise the
ingress of dust into the pump
• To get the best pumping speed, ensure that
the pipeline which connects the process
system to the pump is as short as possible and
has an internal diameter not less than the
pump-inlet.
(Continued on page 10)
WARNING
Ensure that your system can provide
adequate gas-ballast and/or inlet
purge to dilute toxic, flammable or
explosive gases to safe limits. If you
do not, there will be a risk of
emission of hazardous gases.
WARNING
When the pump is switched off, gas
will flow in reverse direction through
the pump and there will be a rapid
pressure rise in the inlet pipeline and
your process system. If this will cause
a dangerous situation (or if it will
adversely affect your process), you
must incorporate suitable devices
(such as a fast-acting inlet isolation-
valve or an outlet check-valve) in
your system pipelines.
WARNING
Incorporate safety devices to prevent
operation of the pump when the
exhaust pipeline is restricted or
blocked. If you do not, the exhaust
pipeline may become over-
pressurised and may burst.