OVERVIEW:
It is a
mechanical
backing
vacuum pump
which is able
to extract
and transfer
gases with an
ultimate
vacuum of
8.10-2 mbar. The outlet
pressure can
reach 2500
mbar with
gases such as
UF6. It is
equipped with
cooling
circuit, with
thermal
control
system and,
for some
applications,
with an oil
heater. The
various
working parts
of the pump
are designed
to provide a
long service
life.
OPERATING
PRINCIPAL:
The pumping
device is
made up of 2
overlapped
scrolls; one
of them is
moving and
the other one
is fixed. The
movement is
provided by 3
crankshafts
(one or two
are driving)
with the same
eccentricity. This movement
causes the
formation of
chambers
between the
two spiral
vanes. Once
these
chambers are
formed, they
remain
closed, and
as a result
of the
movement of
one vane,
they are
progressively,
continuously
reduced in
size and
displaced
towards a
central
exhaust port. In normal
operation,
varying
pumping
conditions
produce
varying
thermal
transfers. To
prevent these
variations
resulting in
differential
expansion
likely to
produce a
dangerous
reduction in
the clearance
between the
vanes, the
pump is
subject to
the action of
a thermal
control and
safety system
for the
lubricating
oil and
cooling water
circuits
which are
designed to
produce even
and uniform
temperatures
of the
various
component
parts of the
pump.
APPLICATIONS:
These pumps
are used all
over the
world to
circulate all
kind of gases
which can be
aggressive,
inert, toxic
or
radioactive
(the only
materials
exposed to
the vacuum
environment
are 304L
stainless
steel, nickel
plated steel
and the metal
that you
choose for
the seals).
For instance,
our model 600
m3/h is used
for pumping
corrosive
gases like
Uranium Hexafluoride
(UF6),
Chlorine Trifluoride
(ClF3)
and HF
for uranium
enrichment
industry.
BENEFITS:
o Completely
dry and fluid
tight vacuum
pump
o Safety
(double
confinement
bellows,
electrical
safety
devices),
reliability
o Maintenance
is carried
out without
opening of
the vacuum
circuit
o Low running
and
maintenance
cost (no
liquid
nitrogen,
long service
life)
o Low noise
and vibration
level
