© Edwards Limited 2011. All rights reserved.
Page 37
Edwards and the Edwards logo are trademarks of Edwards Limited.
Maintenance
A705-40-880 Issue B
shows the locations of the two oil-level sight-glasses on the pump. Refer to
, detail A and check that
the pump gearbox oil-level is at the MAX mark on the bezel of either of the two oil-level sight-glasses. If the oil-level
is below the MAX mark:
1. Remove the oil filler-plug (3) and bonded seal (2): see Note above.
2. Fit a suitable funnel or nozzle to the oil filler- port (1), then pour oil into the pump gearbox until the oil-level is
at the MAX mark on the bezel of the oil-level sight-glass (see detail A).
3. If you overfill the gearbox: place a suitable container under the drain-port (6); unscrew and remove the drain-
plug (4) and bonded seal (5) and allow the oil to drain from the gearbox until the oil level reaches the MAX mark
on the sight-glass (see detail A), then refit and tighten the drain plug (4) and bonded seal (5).
4. Remove the funnel or nozzle from the oil filler-port (1), then refit the bonded seal (2) and oil filler-plug (3).
5.4
Check the shaft-seals purge supply
1. Inspect the shaft-seals purge gas supply pipelines and connections; check that they are not corroded or
damaged. Replace any pipelines and connections that are corroded or damaged.
2. Check that all of the shaft-seals purge gas supply connections are secure. Tighten any connections that are
loose.
3. Check that your purge gas supply can provide the necessary pressure as specified in
.
5.5
Remove the inlet filter
If you left the inlet filter in the pump-inlet when you installed the pump (refer to
), you must remove
the inlet filter after the pump has been in operation for one month. If you do not, the performance of the pump will
be impaired. Use the following procedure.
1. Disconnect the pump-inlet from your process system.
2. Refer to
. Remove the inlet filter (4) from the pump-inlet (3).
3. Reconnect the pump-inlet to your process system: refer to
.
WARNING
You must ensure that the gas supply to your shaft-seal purge cannot be interrupted during pump
operation. Refer to the ATEX manual (P600-60-200) for further details.
WARNING
Your nitrogen supply pressure must comply with the requirements of
. If it does not,
the shaft-seals purge pipelines may become over-pressurised and may explode.
