Edwards RV12, Инструкция по эксплуатации, Страница: 18 / 64

MODE SE-
LECTOR
POSITION
GAS BALLAST CONTROL
Closed (position ‘0’) Low flow (position ‘I’) High flow (position ‘II’)
High
Throughput
mode
S
Ultimate total pressure Ultimate total pressure Ultimate total pressure
mbar Pa mbar Pa mbar Pa
3 x 10
-2
3
6 x 10
-2
(RV3/5)
4 x 10
-2
(RV8/12)
6 (RV3/5)
4 (RV8/12)
1.2 x 10
-1
(RV3)
1.0 x 10
-1
(RV5)
6 x 10
-2
(RV8/12)
1.2 x 10
1
(RV3)
1.0 x 10
1
(RV5)
6.0 (RV8/12)
Use for continuous inlet
pressure above
50 mbar/5 x 10
3
Pa
Maximum water vapour
pumping rate
Maximum water vapour pump-
ing rate
1-phase
pumps
3-phase
pumps
1-phase pumps 3-phase pumps
0.06 kg h
-1
0.04 kg h
-1
0.22 kg h
-1
(RV3/5/8)
0.29 kg h
-1
(RV12)
0.12 kg h
-1
(RV3/5)
0.20 kg h
-1
(RV8)
0.25 kg h
-1
(RV12
3.2.2 Performance characteristics
Note:
The performance characteristics described below are for use with hydrocarbon oil.
The positions of the mode selector and the gas-ballast control define the performance
characteristics of the pump. These performance characteristics are listed fully in Table:
Performance data- High Vacuum mode and Table: Performance data- High throughput
mode .
Table: Performance characteristics gives the ultimate vacuum and maximum water
vapour inlet pressure for each of the six possible combinations of control positions. The
curves 0, I, and II in Figure: Performance characteristics in High Vacuum mode (pumping
speed against inlet pressure) show the relationship between inlet pressure and pumping
speed for High Vacuum mode
S
.
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A65201880_AA - Technical data