© Edwards Limited 2009. All rights reserved.
Page 9
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MAINTENANCE
A505-71-880 Issue C
4
MAINTENANCE
4.1
Safety
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A suitably trained and supervised technician must maintain the Silencer.
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Ensure that the maintenance technician is familiar with and complies with the safety procedures which
relate to the products processed by the pumping system. Wear the appropriate safety-clothing when you
come into contact with contaminated components. Dismantle and clean contaminated components inside a
fume-cupboard.
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Allow the GV pump to cool to a safe temperature before you start maintenance.
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Isolate the GV pump and the other components in the process system from the electrical supply so that they
cannot be operated accidentally.
4.2
Maintenance operations
Note:
If you need to regularly drain condensates or dust from the Silencer, we recommend that you remove the
drain plug and fit a suitable ball-valve to the drain port on the Silencer.
If there are heavy deposits in the Silencer, you may need to remove the Silencer from the pump and use a
suitable cleaning solution to clean the Silencer.
Do the following checks when you maintain the GV pump:
1. Regularly inspect the Silencer and check that it is not corroded or damaged; if the Silencer is corroded or
damaged, you must replace it.
2. Regularly check that the Silencer is securely fitted to the GV outlet and to your exhaust-extraction system;
tighten the connections if necessary.
3. Refer to
. When necessary, drain any condensates or dust from the Silencer:
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Place a suitable container under the drain plug (9), then undo and remove the drain plug (9) and allow any
condensates or dust to drain out of the Silencer (10).
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Apply suitable sealing compound to the threads of the drain plug (9), then refit and tighten the drain plug.
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Dispose of the condensates or dust: refer to
.
WARNING
Obey the safety instructions given below and take note of appropriate precautions. If you do not,
you can cause injury to people and damage to equipment.
WARNING
Take care when you remove the drain plug. There may be back-pressure in the Silencer which
could force condensates past the drain plug during removal.
