Screwline®:SCREWLINE® SP250, and SP630.
Principle of Operation
SCREWLINE® vacuum pumps are dry
compressing backing pumps, the operation
of which is based on the screw
principle. The pumping chamber of the
pump is formed by two synchronized
positive displacement rotors and the
housing enclosing these. Since the
rotors rotate in opposite directions, the
chambers move steadily from the intake
to the exhaust side of the pumps
thereby resulting in a smooth pumping
action.
Since with a single SCREWLINE® rotor pair a multistage
compression process is implemented,
the component count in the
pumping path is very low. In this way
maintenance and servicing work is
much simplified.
Properties
The direct pumping path without multiple
deflections for the medium make
the SCREWLINE® vacuum pumps highly
insensitive to foreign materials. This
ensures a high uptime in industrial processes.
The two shaft-sealed non-contacting
and thus practically wear-free, which
allows for very long maintenance intervals.
For standard applications no purge
gas is required. However, a purge gas
supply can be connected as an option
to purge the seals, should the application
process require this.
Because of the cantilevered bearing
arrangement for the SCREWLINE®
rotors, a potential source of failure (i.e.
a bearing on the intake side) is entirely
eliminated. On the one hand, no lubricants
from the bearings can enter into
the vacuum process, and the other
hand also an impairment of the bearing
by aggressive process media can be
excluded.
A further benefit of the cantilevered
bearing arrangement is the easy
accessibility of the pump chamber.
This innovative design feature allows
the removal of the pump housing without
time-consuming and costly disassembly
of the bearings. Thus on-site
cleaning of all surfaces in contact with
the medium is possible. In particular, if
the processes involved considerable
amounts of contaminants this is a
significant advantage which ensures a
long uptime.
Besides the integrated oil cooling
arrangement for the rotors, the
SCREWLINE® pumps are air-cooled
from the outside. Here rotor and housings
are thermally linked via the oil
cooler. Thus SCREWLINE® pumps
adapt themselves ideally to the
ambient conditions under changing
operating situations.
A water-cooled version is offered as
SCREWLINE® SP630 F. This product
version is intended for operation in air conditioned
rooms.
The SCREWLINE® offer is completed
through ATEX-certified variants.
Moreover, the SCREWLINE® portfolio
also includes pump versions suited for
pumping pure oxygen (O2).
Maintenance and Monitoring
During the development of the
SCREWLINE® pumps special emphasis
was placed on a particularly simple
maintenance concept. On the one
hand this has been implemented
through the cantilevered bearing arrangement,
on the other hand all maintenance
components and controls have
been located on the so-called service
side for easy accessibility. Thus the
space requirement which needs to be
taken into account during planning has
been optimized. The lower space requirement
gives the user more flexibility
during installation of the pump.
The monitoring system SP Guard was
developed specially for constant monitoring
of the operational status of the
SCREWLINE® vacuum pumps. The
operating parameters are constantly
acquired and processed.
This enables the user to introduce
preventive actions early enough so as
to ensure trouble-free operation of his
SCREWLINE® vacuum pumps. The key
current operating parameters can be
read off from a display. Moreover,
connection to a PLC is possible.
Maintenance of the SCREWLINE®
pumps will generally be limited to a
regular visual inspection of the pump
and the annual change of gear oil and
oil filter. The oil fill ports as well as the
filters are readily accessible and can be
easily exchanged.
With the aid of a flushing kit (optional)
it is possible to clean the pump chamber,
while the pump is operating without
process. Deposits due to the process
can thus be removed effectively
and quickly without the need of having
to disassemble the housing.
Also cleaning of the air/oil heat exchanger
can be done simply on-site by
blowing out the heat exchanger with
compressed air.
Accessories
SCREWLINE® vacuum pumps offer to
the user a high degree of flexibility. Inlet
and exhaust connections are made
through universal flanges, respectively
clamped flanges, permit simple integration
within the system. Through the
accessories which are available, the
pump can be optimally adapted to the
individual requirements of differing
applications.
The New Dry Compressing Screw Vacuum
Pump for Industrial Applications
The SCREWLINE® family of pumps was
developed in view of the special requirements
of industrial applications. The
innovative design allows these pumps
to be used where reliable, compact
and low maintenance vacuum solutions
are demanded.
Advantages to the User
Minimum downtimes, maximum
availability, highly rugged
- The only vacuum pump with a
cantilevered bearing arrangement
in the industrial market
- Monitoring through SP Guard
- Highly tolerant of particles and
vapors
Low cost of ownership
- No purge gas and no cooling
water is required for standard
applications
- Low power consumption
- No contaminated waste oil, no
waste disposal costs
Long maintenance intervals and low
servicing complexity
- Easy and rapid accessibility of all
maintenance components and
controls
- Only an annual change of the
gear oil is necessary
- On-site cleaning of the rotors is
easy to perform
Highly flexible
- Accessories are available for
most demanding processes
- The modular concept allows
easy adaptation of the pumping
speed of up to 2000 m3/h by
combination with RUVAC Roots
vacuum pumps
- Connections provided through
universal flanges, respectively
clamped flanges allow for simple
and flexible integration within
systems
- Basic models plus accessories
allow the pumps to be equipped
according to specific requirements
High pumping speed at low ultimate
pressure
Excellent suitability for the short
cycles of load lock chambers or
similar applications |
Typical Applications
- Industrial furnaces
- Coating technology
- Load lock chambers
- Metallurgical systems
- Packaging technology
- Drying processes
- Degassing
- Research and development
- Lamps and tubes manufacture
- Automotive industry
- Packaging industry
- Space simulation
- Electrical engineering
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