SGI offers
the following combinations of pump types in multi stage pump-sets:
 Two stages
vacuum pump-sets, air cooled
First stage rotary lube blower without preinlet cooling,
second stage rotary lube blower with preinlet cooling by air.
Up to 50000 m3/h suction capacity and up to 200 mbar (a) suction
pressure.
First stage radial turbo blower, second stage rotary lube
blower with preinlet-cooling by air.
From 50000 m3/h larger up to 100000 m3/h suction capacity and
up to 200 mbar (a) suction pressure.
Multi stage
processgas vacuum pump-sets,
with interstage water cooling
First stage rotary lube blower with preinlet cooling by
processgas, second or third stage rotary lube blower with preinlet-cooling
by processgas. All interstages are cooled by water cooler. Up
to 60000 m3/h suction capacity and up to 100 mbar (a) suction
pressure.
First stage radial turbo blower, second or third stage
rotary lube blower with preinlet-cooling by processgas. All interstages
are cooled by water coolers. Up to 120000 m3/h suction capacity
and up to 100 mbar (a) suction pressure.
Multi stage
fine vacuum pump-sets.
First and second stage rotary lube fine vacuum blowers
without interstage cooling third and or fourth stage rotary lube
blowers with preinlet-cooling by processgas. Up to 80000 m3/h
suction capacity and up to 10-3 mbar (a) suction pressure.
Assembly of single or multi stage vacuum pump-set
The pumping
stages will be driven via a coupling or an intermediate gear
drive or pulley shaft drive. The pump- sets are prefabricated,
with gear boxes and common low/ high voltage motor for first
and second machine stage. The components are assembled on a basic
machine frame with blower stages, gear boxes and motor. The pump-
sets further include pre-inlet silencer, outlet silencer and
discharge blow off adsorption silencer, piping fittings and instrumentation,
structural steel pipe supports.
SGI patented air cooled dry two stage vacuum pump-set
First stage
is a rotary lube blower or turbo blower, second stage is a preinlet
cooled rotary lube blower. The gas leaving the first vacuum pump
stage with out preinlet cooling at high temperature is fed to
the inlet of the second vacuum pump stage without the interposition
of cooling by water injection or by a water or air cooled heat
exchanger. Before the rotary piston of the preinlet stage opens
the conveying chamber to the pressure side of the machine, cooling
air from the preinlet channel from atmosphere enters into the
conveying chamber and air/gas is mixed with the air/gas conveyed
from the suction side of the pumpstage and compresses the mixed
air/gas at lower temperature level to atmospheric pressure.
SGI- ProcessVac-
vacuum pump-sets offer:
Customer and application oriented design.
Selection of the pump-set stages corresponding to the process
requirements with respect to gas quantity, gas type, final pressure,
suction temperature and sealing.
Low energy consumption due to an optimized, computer aided design.
High volumetric and mechanical efficiency due to optimized staging
of the pump-set, speed and type of drive unit.
Further improvement of the volumetric efficiency due to rotor
clearance adaption to the operating temperature encountered.
Special sealing of the conveying chamber to the gear box to prevent
a backflow of oil into the conveying chamber.
Minimization of the motor capacity installed by choosing an optimum
kind of drive.
Low maintenance cost due to interchangeable rotor wear strips
made of stainless steel.
Minimization of space requirements and piping layout due to an
optimized installation layout of the pump-set taking into consideration
the maintenance requirements.
Adaptation of the blower lubrication to the individual blower
speed.
|
