A730-01-880 Issue E
Page 20 © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Maintenance
5.3 Inspect and clean the inlet strainer
Whenever you disconnect the pump from your vacuum system, we recommend that you:
z Remove any debris trapped by the inlet strainer (in the inlet port).
z Inspect the inlet strainer and if necessary, clean it with a cleaning solution suitable for the substances
pumped. Refit the inlet strainer before you reconnect the pump to your vacuum system.
1. Refer to Figure 5. Disconnect your vacuum system from the pump inlet-port (3) and remove the centring-ring
and strainer assembly (1) and the 'O' ring (2). Inspect the centring-ring and the 'O' ring. If they are clean,
continue at Step 5. If they are not clean, continue at Step 2.
2. Remove the 'O' ring (2) from the centring-ring and strainer assembly (1). Do not allow the 'O' ring to come into
contact with the cleaning solution.
3. Wash the centring-ring and strainer assembly in a suitable cleaning solution and allow it to dry.
4. If necessary, wipe the 'O' ring with a clean, dry, lint-free cloth.
5. Refit the centring-ring and strainer assembly and the 'O' ring to the inlet-port. Refit your vacuum system to the
pump inlet-port.
Figure 5 - Inlet strainer assembly
Table 9 - Maintenance plan
Operation Frequency Refer to Section
Inspect and clean inlet strainer Annually 5.3
Inspect and clean the gas ballast control Annually 5.4
Clean the external fan cover Annually 5.5
Replace the tip seal and exhaust valve Annually or as required 5.6
Test the motor / drive condition 15000 hours 5.7
Replace the bearings 35000 hours Refer to Edwards
1. Centring ring and strainer
2. 'O' ring
3. Pump inlet-port
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