Elmo Rietschle L-BV3 - Manual (Page 8)

Technical Data
610.444430.40.000 8 / 32 © Gardner Denver Deutschland GmbH
Operating-liquid temperature:
max. +40 °C max. +104 °F
min. +5 °C min. +41 °F
Nominal value:
+15 °C +59 °F
Ambient temperature:
max. +40 °C +104 °F
min. +5 °C +41 °F
Pressures
Min. inlet pressure p
1 min
:
Depending on the type and temperature of the
operating liquid.
During vacuum operation without cavitation
protection (cavitation protection hole closed):
5 kPa 0.725 psi
It may not be dropped below to prevent
damage due to cavitation!
Damage due to cavitation are purposely
disregarded if the minimum inlet pressure is
3.3 kPa [0.479 psi].
The specified values apply to the following
conditions:
 Operating liquid:
Water at +15 °C [+59 °F]
 pumped gases/vapors:
dry air at +20 °C [68 °F]
They are higher the higher the temperature
and the higher the vapor pressure of the
operating liquid used.
During vacuum operation with cavitation
protection (cavitation protection hole open):
max. achievable vacuum, i.e. complete
throttling
The following generally applies: The higher the
temperature, the lower the intake capacity, i.e.
the higher the minimum achievable inlet
pressure.
Max. discharge pressure p
2 max
during
vacuum operation:
110 kPa abs. 16.0 psia
This value applies, provided the rated
operating-liquid flow rate is adhered to.
Max. discharge pressure (differential
pressure) p
2 max
during compressor
operation (at inlet pressure p
1
= 101.3
bar abs. [14.7 psia]):
60 kPa 8.70 psi
This value applies, provided the rated operating-
liquid flow rate is adhered to.
Max. permissible pressure in the pump-
motor unit p
int max
during compressor
operation:
300 kPa abs. 43.5 psia
If higher pressures can occur in the system, then
corresponding protective devices must be provided.
Max. pre-pressure of the operating liquid
300 kPa abs. 43.5 psia
When the permissible operating liquid pressure is
exceeded, too much liquid enters the vacuum
pump/compressor. Damage can occur.
Liquid quantities
Nominal operating-liquid flow rate
(with dry air extraction and with water at 15 °C
[59 °F] as operating liquid)
0.65 l/min 0.172 gal (US)/min 0.143 gal (UK)/min
(0.039 m³/h) (1.38 ft³/h)
Max. filling quantity for operating liquid at a
standstill
0.200 l 0.053 gal (US) 0.044 gal (UK)
Repeated switching on of the pump-motor unit
in the flooded state can result in damage.
Maximum permissible quantity of water
entrained via the inlet connection
3.9 l/min 1.03 gal (US)/min 0.858 gal (UK)/min
If larger quantities can occur, a separator must be
installed upstream on the inlet side.