Elmo Rietschle L-BV5 Operating instructions - Manual (Page 11)

Technical data
© Gardner Denver Deutschland GmbH 11 / 32 610.44440.40.000
Min. suction pressure p
1 min
for operation
without cavitation-protection*
Cavitation-protection tapping closed
[mbar abs.] [psia]
80 1.16
As a general rule:
The min. suction pressure will be the higher in de-
pendence of the height of the temperature and the
height of the vapour pressure of the operating-
liquid used.
The min. suction pressure must at least be main-
tained otherwise damage may be caused by the
resulting cavitation.
When operating without cavitation-protection the
minimum suction pressure is to be set above the
level of the hatched range (Fig. 2, page 10).
* Dependent on the type and temperature of the
operating-liquid. The values apply for standard
conditions:
 operating-liquid: water at +15 °C [+59 °F]
 gases / vapours: dry air at +20 °C [68 °F]
 design operating-liquid flow
Max. discharge pressure p
2 max
for vacuum op-
eration*
Type
[bar abs.] [psia]
2BV2 ... 1.1 16.0
2BV5 ... 1.3 18.9
* when the design operating-liquid flow is main-
tained.
Max. discharge pressure, p
2 max
for compressor
operation
(at suction pressure, p
1
= 1 bar abs. [14.5 psia])
Type [bar abs.] [psia]
At
50 Hz:
at
60 Hz:
at
50 Hz:
at
60 Hz:
2BV2 060–....2–.. 2.5 2.2 36.3 31.9
2BV2 061–....3–.. 2.4 1.9 34.8 27.6
2BV2 070–....3–.. 3.6 2.9 52.2 42.1
2BV2 071–....5–.. 3.5 2.6 52.2 37.7
2BV5 110–....1–.. 1.85 1.6 26.8 23.2
2BV5 111–....3–.. 1.9 1.5 27.6 22.5
2BV5 121–....3–.. 1.85 1.4 26.8 20.3
2BV5 131–....1–.. 1.7 1.4 24.6 21.8
2BV5 161–....2–.. 1.8 1.5 27.6 23.9
2BV5 410 2.0 2.0 29.0 29.0
Max. permissible pressure within unit, p
int max
Type [bar abs.] [psia]
2BV2 … 8 116
2BV5 1.. 8 116
2BV5 4.. 6 87.0
If higher pressures can occur elsewhere in the
system, then appropriate protection devices are to
be installed
Liquid quantities
For extraction of dry air and using water at 15°C
[59 °F] as the operating-liquid, the following de-
sign operating-liquid flows apply:
Design operating-liquid flow [m³/h]
Type
Flow rate,
Vacuum operation
in the pressure range
[mbar]
33-200 200-500 >500
Flow
rate,
com-
pressor
opera-
tion
2BV2 060 0.20 0.20 0.20 0.20
2BV2 061 0.23 0.23 0.23 0.25
2BV2 070
0.28 /
0.34* 0.14 /
0.17* 0.14 /
0.17*
0.50
2BV2 071 0.54
0.23
0.28* 0.23
0.28*
0.70
2BV5 110 0.80 0.35 0.30 0.90
2BV5 111 1.20 0.40 0.35 1.20
2BV5 121
1.20 /
1.50*
0.40 0.35 1.50
2BV5 131 1.80 0.45 0.40 1.80
2BV5 161 2.40 0.70 0.50 2.40
2BV5 410 0.80 0.80 0.55 0.80
* Value for 50 Hz operation / value for 60 Hz op-
eration
All other values for 50 Hz and 60 Hz operation.