9 255548 Rev.1
3 Design and functioning
3.1 Marking
3.1.1 Nameplate
1. Type
designation
2. Item
identifi cation number (pump / aggregate)
3. Serial
number
4. Delivery data at 50 Hz
Nominal speed
Maximum suction volume
Minimum inlet pressure
Power requirements
5. Delivery data at 60 Hz
Nominal speed
Maximum suction volume
Minimum inlet pressure
Power requirements
Fig. 1 Nameplate (example)
3.1.2 ATEX plate
1. Type
designation
2. Year of manufacture
3. Serial
number
4.1 Explosion protection mark: aggregate inside
4.2 Explosion protection mark: aggregate outside
Fig. 2 ATEX plate (example)
3.1.3 Pump type code
V
155
55
1
2
3
1. Series
2. Size
3. Material design code
Tab. 6 Pump type code (example)
3.2 General description
Th
e pumps of the SM series are horizontal, single-stage
liquid ring vacuum pumps with radial inlet and outlet.
Th
e internal control of the gas to be pumped is realized by
means of inter casings (1) with control slots and additional
valve technology (2).
Th
e electrical drive is modularly screwed to the pump
(aggregate). A maintenance-free mechanical seal (4) in the
shaft sealing casing is used to seal the shaft .
Th
e aggregates of the SM series are able to deliver low liquid
fl ow rates. Th
e discharged operating liquid can be re-used
when using a separator.
1. Inter
casing
2. Valves
3. Pump cover with integrated inter casing
4. Mechanical
seal
5. Motor/pump
shaft
6. Impeller
Fig. 3 Description of pump type SM
