Edwards EXT250 Series, Инструкция по эксплуатации, Страница: 15 / 42

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Technical data
B722-01-880 Issue K
Table 4 - EXT250 performance data
DN100CF DN100ISO-K
Pumping speed
*
Nitrogen 240 l s
-1
240 l s
-1
Helium 250 l s
-1
250 l s
-1
Hydrogen 190 l s
-1
190 l s
-1
Compression ration
Nitrogen > 1 x 10
8
> 1 x 10
8
Helium 2 x 10
4
2 x 10
4
Hydrogen 1500 1500
Ultimate pressure
†
< 5 x 10
-10
mbar < 5 x 10
-9
mbar
< 5 x 10
-8
Pa < 5 x 10
-7
Pa
Maximum continuous inlet pressure
‡
Water-cooling at 15
o
C
with EXC100/120 1 x 10
-1
mbar
1 x 10
1
Pa
1 x 10
-1
mbar
1 x 10
1
Pa
with EXC300 3 x 10
-1
mbar
3 x 10
1
Pa
3 x 10
-1
mbar
3 x 10
1
Pa
Air-cooling at 35
o
C 3 x 10
-2
mbar
3 x 10
0
Pa
3 x 10
-2
mbar
3 x 10
0
Pa
Nominal rotational speed 60000 r min
-1
60000 r min
-1
Standby rotational speed 42000 r min
-1
42000 r min
-1
Starting time to 90% speed
with EXC120/120E 100 sec 100 sec
with EXC300 90 sec 90 sec
Recommended Controller EXC100/120 EXC100/120
EXC120/E maximum input 250 VA 250 VA
EXC120/E normal power 60 VA 60 VA
Other compatible Controller EXC300 EXC300
EXC300 maximum input 480 VA 480 VA
EXC300 normal power 60 VA 60 VA
Quiescent power consumption 25 W 25 W
*
Pumping speeds are without inlet-screen. Inlet-screens are supplied fitted and reduce speed by approximately
10%.
†
Ultimate pressure 48 hours after bakeout with 2-stage rotary vane backing-pump.
‡
Above this pressure, rotational speed drops below nominal.