Installation | 5
0870231039_LG_LR_-_IM_en
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The condition of both the operating liquid and the conveyed media depend on the phys-
ical conditions pressure and temperature.
At a very low pressures and sufficiently high temperatures the operating liquid can locally
transfer into the vapour phase, creating bubbles within the operating liquid. This process
is called “cavitation” and may deteriorate the machine and its performance, see
Recommended operating liquid (water) settings at various inlet pressures:
LG 0890 A
Speed
r/min
< 200 mbar
m³/h
200 - 400 mbar
m³/h
400 - 600 mbar
m³/h
> 600 mbar
m³/h
490
472
420
372
330
16.6 - 17.5
16.0 - 17.0
14.5 - 15.0
12.8 - 13.5
11.5 - 12.0
14.7 - 16.6
14.2 - 16.0
12.6 - 14.5
11.2 - 12.5
9.9 - 11.5
10.8 - 14.7
10.3 - 14.2
9.2 - 12.6
8.1 - 11.2
7.2 - 9.9
7.5 - 10.8
6.7 - 10.3
5.9 - 9.2
5.3 - 8.1
4.7 - 7.2
LG 1200 A
Speed
r/min
< 200 mbar
m³/h
200 - 400 mbar
m³/h
400 - 600 mbar
m³/h
> 600 mbar
m³/h
420
372
330
298
266
23.5 - 24.1
20.5 - 21.3
18.5 - 18.9
16.5 - 17.1
14.5 - 15.3
20.5 - 23.5
18.2 - 20.5
16.1 - 18.5
14.5 - 16.5
13.0 - 14.9
15.0 - 20.5
13.3 - 18.2
11.8 - 16.1
10.6 - 14.5
9.5 - 13.0
9.6 - 15.0
8.5 - 13.3
7.5 - 11.8
6.8 - 10.6
6.1 - 9.5
LG 1910 A
Speed
r/min
< 200 mbar
m³/h
200 - 400 mbar
m³/h
400 - 600 mbar
m³/h
> 600 mbar
m³/h
398
372
330
298
266
236
37.0 - 38.0
34.5 - 35.5
30.5 - 31.5
27.5 - 28.5
24.5 - 25.5
21.5 - 22.5
37.5 - 31.9
29.8 - 35.0
26.4 - 31.0
23.9 - 27.5
21.3 - 25.0
18.9 - 22.2
23.3 - 31.9
21.8 - 29.8
19.3 - 26.4
17.5 - 23.9
15.6 - 21.3
13.8 - 18.9
15.0 - 23.3
14.0 - 21.8
12.4 - 19.3
11.2 - 17.5
10.0 - 15.6
8.9 - 13.8
LG 2680 A
Speed
r/min
< 200 mbar
m³/h
200 - 400 mbar
m³/h
400 - 600 mbar
m³/h
> 600 mbar
m³/h
330
298
266
236
210
197
50.0 - 52.0
45.0 - 46.0
40.0 - 43.0
36.0 - 38.0
32.0 - 34.0
30.0 - 32.0
44.2 - 51.8
39.9 - 46.8
35.6 - 41.8
31.6 - 37.1
28.1 - 33.0
26.3 - 28.3
32.3 - 44.2
29.2 - 39.9
26.1 - 35.6
23.1 - 31.6
20.6 - 28.1
19.0 - 26.3
20.7 - 32.3
18.7 - 29.2
16.7 - 26.1
14.8 - 23.1
13.2 - 20.6
12.0 - 19.0
