TECHNICAL INFORMATION
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87-900-977-01(C)
SECTION I
TECHNICAL DESCRIPTION
DS42 is a dual-stage, rotary vane pump oil sealed,
driven by a single-phase electric motor.
It is available in two models:
-
DS 42 949-9308 100-110 V nominal voltage
-
DS 42 949-9309 220-240 V nominal voltage
This vacuum pump is suitable for pumping non
corrosive gases.
The main features are:
-
all materials are carefully selected to provide
extended life;
-
a high capacity gas ballast device allow to
pump condensable vapors;
-
all the parts composing the pump are fully re-
placeable due to the close machining toler-
ances and to the centering obtained by using
reference pins;
-
due to its design features and low number of
gaskets, the pump requires little maintenance,
disassembly and reassemble are easy and
require minimal time.
The pump works with force-feed lubrication, pro-
vided by an auxiliary gear-pump driven by the rotor
of the vacuum pump itself. This ensures proper lu-
brication even when pressures are close to at-
mospheric.
The entire pump functional block is immersed in
the oil contained in the casing. The oil guarantees
perfect sealing of the discharge valves, enters the
pump to ensure lubrication and sealing of the parts
inside, facilitates heat dissipation and reduces
pump noise.
The pump is equipped with a special anti-
suckback device.
There is one oil seal on the rotor shaft, preventing
oil from seeping out of the pump. This seal acts on
a bushing fitted onto the shaft.
The vacuum pumps are connected directly to the
electric motor through a flexible coupling, so that
motion is transmitted even in case of poor align-
ment.
LUBRICATION
The pump’s lubricating system is force-feed type.
Oil circulation is obtained by means of a gear
pump connected to the rotor shaft.
The required flow of oil under pressure passes
through ducts that are drilled in the walls of the
pump and lubricates the bushings and the inside
parts.
INLET PORT
OUTLET PORT
