4
2.1. Main Features
2. Understanding The Rotary Vane Pumps
2.2. Differences Between The Pump Types
Type
Stage
Nominal
Attainable
flow rate
Final Pressure
at 50 Hz
(Total, without
Gasballast)
UNO 120 A
one stage
128 m3/h
< 3
•
10-2 mbar
DUO 120 A
two-stage
128 m3/h
< 2
•
10-3 mbar
The UNO 120 A is a single stage and the DUO 120 A is a two
stage rotary vane pump.
Special features:
– Pressurised oil lubrication
– Hydraulically controlled high vacuum safety valve
– Optional: Oil filter systems, Condensate separator,
Operational monitoring systems.
Proper Use
– Rotary Vane Pumps UNO/DUO 120 A may only be used to
generate vacuum.
– Do not use the pump as a compressor.
– Do not pump corrosive or explosive gases (a special versi-
on for these operations is available on request).
– Do not operate the pumps where explosive processes are
involved. This is only permitted with the "explosive" version
of the pump.
– Using accessories not named in this manual is not permit-
ted without authorisation from PFEIFFER.
Improper use will cause any rights regarding liability and gua-
rantees to be forfeited.
Special Models
Helium tight model:
– Operating Fluid P3
– Leak rate < 1
•
10-5 mbar l/s
– Additional radial shaft seal with sealing oil chamber
Korrosivgasausführung:
– Operating fluid F5
– Leak rate < 1
•
10-5 mbar l/s
– Additional radial shaft seal with sealing oil chamber
– Vanes made from special materials
– Gas ballast valve in special version
Rotary Vane Vacuum Pumps UNO120 A, DUO 120 A
1
Sight glass
2
Gas ballast valve, complete;
3 Motor,
4
Exhaust flange,
5
Vacuum flange,
15 Casing
18 Baffle Plate
28 Support Stand
42 Operating fluid filler screw
43 Operating medium drain screw
45 Connection socket
1 42
15
5
4
2
3
43
18
45
28
Improper Use
The following are regarded as improper:
– Uses not covered above, and, in particular:
– Connection to pumps and units which is not permitted
according to their operating instructions.
– Connection to units which contain touchable and voltage
carrying parts.
Improper use will cause any rights regarding liability and gua-
rantees to be forfeited
