3
Operation
No
oiling
or
other
lubrication
is
necessary
with
a
Dia
‐
Vac®
pump.
If
the
gas
stream
has
a
high
level
of
particulate
matter,
a
filter
should
be
installed
before
the
pump.
If
the
gas
stream
has
a
high
level
of
liquid
matter,
a
membrane
separator
should
be
installed
before
the
pump.
This
should
be
used
in
conjunction
with
best
practices
for
pump
installation
including
mounting
the
pump
head
so
that
the
discharge
port
faces
toward
the
ground.
Keep
in
mind
that
the
pump
head
can
be
rotated
in
any
direction
on
the
housing.
The
gas
will
always
flow
in
the
direction
of
the
arrows
on
top
of
the
head.
The
elevated
and
extended
pumps
are
for
use
in
hazardous
areas
where
heated
heads
cannot
be
used
to
prevent
condensation
buildup
in
the
pump.
These
pumps
are
designed
to
have
head
or
heads
mounted
in
a
heated
enclosure
to
prevent
condensation
of
vapors
within
the
pump
head.
The
plate
of
either
of
these
pumps
can
hold
the
entire
weight
of
the
pump.
This
pump
can
be
mounted
in
any
position.
If
the
housing
needs
to
be
rotated
for
mounting
purposes,
that
can
be
done
at
the
ADI
facility.
Do
not
start
the
pump
against
pressure
or
vacuum.
For
applications
that
must
start
under
pressure
or
vacuum,
contact
ADI
and
a
suitable
motor
will
be
selected.
Running
amps
are
listed
on
the
nameplate
of
the
motor.
A
pump
running
at
a
substantially
higher
current
than
shown
on
the
motor
plate
indicates
a
problem,
please
see
section
“Troubleshooting”
below.
Please
note
that
the
current
draw
at
the
startup
of
the
pump
will
be
three
to
four
times
the
normal
running
amps.
For
high
pressure
applications,
outlet
pressures
above
15
psig,
please
consult
an
ADI
representative
for
proper
motor
sizing.
The
pump
is
designed
for
atmospheric
pressure
or
vacuum
on
the
inlet.
For
applications
with
inlet
pressure
greater
than
0
psig;
contact
ADI
and
a
suitable
pump
will
be
selected.
The
diaphragm,
valve
discs,
sealing
washer,
and
gasket
are
the
only
consumable
parts
of
the
pump.
The
degree
of
usage
and
condition
of
operating
temperatures
or
pressure
will
determine
the
rate
of
replacement
of
part
or
parts.
For
heavy
loads
(25
‐
75
PSI)
and
constant
operation
the
diaphragm
should
be
inspected
at
least
every
six
months.
For
lighter
loads
(0
‐
15
PSI
or
up
to
maximum
vacuum)
or
pumps
with
reduced
eccentric
the
diaphragm
may
operate
successfully
for
a
year
or
more.
The
corrosive
content
of
the
gas
media
being
pumped
can
affect
the
recommended
inspection
and
replacement
cycle
of
the
diaphragm.
The
minimum
performance
acceptable
of
a
single
head
of
an
R
‐
series
pump
is
shown
in
the
table
below.
Pumps
operating
at
50
Hz
have
a
17
percent
lower
flow
rate
than
their
60
Hz
counterparts.
To
check
pumping
efficiency,
employ
suitably
damped
gauges
connected
so
as
to
dead
‐
head
either
pressure
or
vacuum.
