Elmo Rietschle L-BV7 - Manual (Page 45)

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Accessories
13.3 Gas ejector
The gas ejector is used when an inlet
pressure of the unit in the range from
40 mbar [0.580 psi] to 10 mbar [0.145 psi] is
to be achieved.
The gas ejector compresses the pumped
gases/vapors sucked in to the inlet pressure of
the pump-motor unit.
Ambient air at 20°C [68 °F] and 1013 mbar
[14.7 psi] is used as a propellant. This air may
not contain any liquid droplets.
See Fig. 19, Pg. 45.
Fig. 19: Gas ejector
Mounting
The gas ejector is mounted when connecting
the pipes/hoses, as described in Chapter 7.3,
"Connecting pipes/hoses (vacuum
pump/compressor)", Pg. 25.
Proceed as follows:
 Screw the gas ejector onto the inlet
connection.
Use commercially available liquid sealant
(e.g. Loctite) when doing so.
Tightening torque: dependent on the
sealant.
 Screw the inlet pipe onto the gas ejector.
Use commercially available liquid sealant
(e.g. Loctite) when doing so.
Tightening torque: dependent on the
sealant.
 With soiled ambient air:
Screw a propellant line onto the gas ejector.
When evacuating containers, the gas ejector
operates as a throttle in the range from
1000 mbar [14.5 psi] to approx. 100 mbar
[1.45 psi]. To achieve fast venting times here,
the gas ejector can be bypassed with a bypass
pipe. The bypass pipe must be closed if the
gas ejector is to be effective. The best point for
switching over to operation with the gas ejector
is at approx. 40 mbar [0.580 psi].