Product Description | 2
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2.2 Operating Principle
INLET
DISCHARGE
SIDE INLET
SIDE
DISCHARGE
The machine works on the liquid ring principle.
An eccentrically mounted impeller rotates in a housing partially filled with operating li-
quid (usually water). The impeller blades dip into the fluid, and the centrifugal force ex-
erted by their rotation forms a so-called liquid ring within the housing. The pumped me-
dium is transported in the spaces between the blades and the liquid ring. The eccentric
rotation of the impeller alters the volume of these spaces, causing gas to be drawn in,
compressed and expelled.
2.3 Application
The machine is intended for the suction of air, vapour and other gases.
For explosive gases and vapours (if a "Ex(inside)" sign is written on the nameplate),
please refer to the ATEX supplement for additional safety information on operation in
hazardous zones.
Conveying of other media leads to an increased thermal and/or mechanical load on the
machine and is permissible only after a consultation with Busch.
The machine is intended for the placement in a non-potentially explosive environment.
The machine is capable of maintaining ultimate pressure, see
.
The machine is suitable for continuous operation.
Permitted environmental conditions, see
.
2.4 Start Controls
The machine comes without start controls. The control of the machine is to be provided
in the course of installation.
2.5 Variants
2.5.1 LG Series
Dolphin LG’s are single-stage vacuum pumps and operate from atmospheric pressure to
160 hPa (mbar) ultimate pressure.
2.5.2 LR Series
Dolphin LR’s are single-stage vacuum pumps and operate from atmospheric pressure to
33 hPa (mbar) ultimate pressure.
