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A419-00-880
Issue
K
3.
5
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~
Connect the outlet to the exhaust extraction system
WARNING
Do not touch the pump exhaust
whilst
the pump
is
running
since
the temperature of these parts
can
cause burns. Pump exhaust
will remain
hot after pump has
stopped.
WARNING
Pipe
the
exhaust
to
a
suitable treatment
plant to prevent
the
discharge of dangerous gases or
vapours
to
the
surrounding
atmosphere.
CAUTION
Do not
incorporate check valves
or one-way
valves in
the exhaust pipeline. If
so,
the EPX pump
will
not operate
correctly
and may be damaged.
CAUTION
Install an
outlet catchpot
to prevent
the
drainage of condensate back into
the
pump. If not, condensate
which
drains back
into
the pump may damage
it
or cause
it to seize.
CAUTION
It
is
essential
that
on the EPX Twin pump,
both
exhaust ports are
connected
to a
suitable
exhaust
system.
Note
:
If the exhaust
extraction
system
is
unrestricted,
and
so
cannot be sealed for leak test
purposes,
leak
test
the system (refer to
Section
3.7)
before
connecting
the pump
outlet.
Remove the blanking plugs from the outlet(s)
(Figure
2,
item 8 [there are two outlets on the
EPX
Twin]),
use a
suitable clamp and seals to
connect
the
outlet(s)
to the
exhaust
pipeline.
Take
note
of
the following when connecting
the
exhaust
pipeline:
•
If the exhaust pipeline incorporates
any
shut-off
valves,
the operation
of
the pump must
be
prevented when
any
of
the
valves
are
closed (that
is,
the
pipeline is restricted or blocked).
If
the
EPX
(Twin)
pump operates
when the pipeline is restricted or
blocked,
the pump will not operate correctly
and
may be
severely
damaged
.
•
A
check
valve should not be incorporated in the
exhaust
line of the
EPX
(Twin)
pump.
If
so,
the
EPX
(Twin)
pump may
not operate properly and may become damaged. If
an exhaust
check valve is
unavoidable,
then
ensure
the pump is
at
atmospheric
pressure
(for
example,
by use of
a
foreline
purge)
before starting the
pump. This
applies
to
all EPX
(Twin)
pump variants.
•
Incorporate
flexible
bellows in the
exhaust
pipeline
to
reduce the
transmission
of vibration and to prevent
the loading of coupling joints. If flexible
bellows
are
used,
ensure
that
the
bellows used have a maximum
pressure
rating which is greater than the highest pressure that can be generated in the
system,
and which
can
withstand the maximum
temperatures that
can be
generated
by the process
conditions,
for
example,
braided flexible bellows may
be
used for this purpose.
•
The
exhaust
pipeline must be
a
minimum diameter of NW25 throughout.
Page 30
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Edwards Limited
2017.
All rights reserved.
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are trademarks of Edwards
Limited.
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