18
Installation
5.6
Connecting accessories
The following accessories are not included in the delivery, and can be ordered separate-
ly:
Sealing gas connec-
tion
The evacuation of high-boiling media (e.g. solvents) can be damaging to the lubricant.
Damage can be avoided by letting in sealing gas (process-specifically) into the shaft pas-
sageways between the operating chamber and the gear chamber.
The sealing gas line should be connected at both connections of each bearing bracket
(4 x G 3/8").
Connect gas cylinder 325 with pressure reducer 324 to flow meter 315, adjust amount
of sealing gas
Fig. 10: Connecting sealing gas
Using a flushing de-
vice
Depending on requirements, the Roots pump can be flushed continuously or temporari-
ly
, if the evacuated medium is causing severe contamination or de-
posits in the suction chamber. The injection nozzle is set to the maximum fluid quantity
of the pump at a pressure of 3000 hPa.
Attach flushing adapter to the vacuum flange.
For sealing and throughflow monitoring install a shut-off valve and a flow meter with
dosing valve into the inflowing line.
10
Bearing bracket
315 Flow meter with dosing
valve
324 Pressure reducer
325 Gas cylinder
10
10
324
315
325
NOTICE
Risk of damage to the pump!
During the flushing and cleaning procedure the flushing liquid and the process medium
can pass over into the bearings and oil chambers and can stick there.
To protect the bearings during cleaning, sealing gas must always be used.
