Exhaust Filter
Check during Standstill or during Operation
●
Check that there is no growing oil film on and/or around the
safety valve (a light oil film on the safety valve is normal)
Checks during Operation
●
Make sure that the vacuum pump is running
●
Check that the drive motor current drawn is in the usual range
●
Check that the discharged gas is free from oil
Assessment
If
there is a growing oil film on and/or around the safety valve,
the drive motor draws too much current and/or the pump flow rate
has dropped,
then the exhaust filter is clogged and must be replaced.
Note
: Exhaust filters cannot be cleaned successfully. Clogged exhaust
filters must be replaced with new ones.
If
the drive motor draws less current than usual,
then the exhaust filter is broken through and must be replaced.
If the discharged gas contains oil,
the exhaust filter can either be clogged or broken through and, if appli-
cable, must be replaced.
WARNING
_ad
The proper assembly of flame arrestors is essential for their safe
function.
Risk of explosion in case of faulty assembly!
Flame arrestors must only be serviced by personnel that have re-
ceived specific training for this purpose either by Busch or by the
manufacturer of the flame arrestors.
If there is still a growing oil film on and/or around the safety valve af-
ter the replacement of the exhaust filter, the flame arrestor (k) on the
discharge/pressure side can be soiled:
◆
Service the flame arrestors (i) (k) (d) - in case of discolouration
or deformation consult Busch or the manufacturer of the flame
arrestor in any case
Change of the Exhaust Filter
DANGER
_age32
In case the vacuum pump conveyed gas that was contaminated
with harmful foreign material the exhaust filter will be contami-
nated with harmful material.
Danger to health during the changing of the contaminated exhaust
filter.
Danger to the environment.
Wear personal protective equipment during the changing of the
contaminated exhaust filter.
Used exhaust filters are special waste and must be disposed of
separately in compliance with applicable regulations.
CAUTION
_a1
The filter spring can fly out of the exhaust port during removal or
insertion.
Risk of eye injury.
Eye protection goggles must be worn while handling filter springs.
Removing the Exhaust Filter
●
Make sure that the vacuum pump is shut down and locked against
inadvertent start up
●
Prior to disconnecting pipes/lines make sure that the connected
pipes/lines are vented to atmospheric pressure
●
Remove the discharge line, if necessary
●
Remove the exhaust cover (k) from the oil separator (j)
●
Loosen the screw in the centre of the exhaust filter retaining
spring, but do not remove it at this time
●
Press the exhaust filter retaining spring out of the indent and ro-
tate it
●
Remove the exhaust filter retaining spring from the oil separator (j)
●
Pull the exhaust filter out of the oil separator (j)
Inserting the Exhaust Filter
●
Make sure that the new exhaust filter is equipped with a new
o-ring
●
Insert the exhaust filter such that its port is properly seated in its
receptacle in the oil separator (j)
●
Make sure that the tip of the screw in the centre of the exhaust fil-
ter retaining spring protrudes the retaining spring by about
2 - 5 revolutions
●
Insert the exhaust filter retaining spring such that its ends are se-
cured in their receptacles in the oil separator (j) by the protrusions
and that the tip of the screw snaps into the indent of the exhaust
filter
●
Tighten the screw in the exhaust filter retaining spring such that
the screw head touches the spring steel sheet
●
Make sure that the seal under the exhaust cover (k) is clean and
undamaged, if necessary replace with a new seal
●
Mount the exhaust cover (k) together with the seal, hex head
screws and lock washers on the oil separator (j)
●
If necessary connect the discharge line
Note
: During operation the exhaust filter gets saturated with oil. It is
therefore normal that the oil level will drop slightly after replacement
of the exhaust filter.
Overhaul
In case the vacuum pump is used in potentially explosive atmosphere
and/or to convey potentially explosive gases/gas mixtures:
WARNING
_ad
Improper work on the vacuum pump puts the operating safety at
risk.
Risk of explosion!
Any dismantling of the vacuum pump that is beyond of what is de-
scribed in this manual must be done by specially trained Busch ser-
vice personnel only.
Maintenance
RE 0016 B / RE 0040 B / RE 0063 B with safety valve, without motor
page 12
0870142823
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