Edwards DRYSTAR GV Series, Инструкция по эксплуатации

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© Edwards Limited 2009. All rights reserved. Page 31
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MAINTENANCE
A705-74-880 Issue K
5 MAINTENANCE
5.1 Safety

A suitably trained and supervised technician must maintain the pump.

Ensure that the maintenance technician is familiar with the safety procedures that relate to the synthetic
oils used and the products pumped. Wear the appropriate safety clothing when you come into contact with
contaminated components and pump oil. Dismantle and clean contaminated components inside a fume-
cupboard.

Use suitable lifting equipment and wear safety shoes when you replace the pump-motor or the pump
module.

Allow the pump to cool to a safe temperature before you start maintenance work. Note that the coolant
jacket may contain coolant with residual pressure and should be vented.

Isolate the pump and other components in the process system from the electrical supply so that they cannot
be operated accidentally.

Recheck the pump rotation direction if the electrical supply has been disconnected.

Do not reuse O-rings or gaskets if they are damaged.

Protect sealing-faces from damage.

Do not touch or inhale the thermal breakdown products of fluorinated materials that may be present if the
pump has overheated to 500°F (260°C) and above. These breakdown products are very dangerous. The pump
may have overheated if it was misused, if it malfunctioned, or if it was in a fire. Edwards Material Safety
Data Sheets for the fluorinated materials used in the pump are available on request: contact your supplier or
Edwards.

Leak-test the system after installation work is complete and seal any leaks found to prevent leakage of
dangerous substances out of the system and leakage of air into the system: refer to
Section 3.12 .
5.2 Maintenance plan
The maintenance plan in Table 6 details the maintenance operations Edwards recommend to maintain the pump in
normal operation. Instructions for each operation are given in the section shown. In practice, the frequency of
maintenance is dependent on your process. In clean processes, you may be able to decrease the frequency of
maintenance operations; in harsh processes you may have to increase the frequency of maintenance operations.
Adjust the maintenance plan according to your experience.
Use Edwards spares and maintenance kits (refer to Section 7.3 ). These contain all of the necessary seals, and other
components necessary to complete maintenance successfully.
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
Particular caution should be exercised when working with Fomblin oil that may have been exposed
to temperatures above 260°C. Refer to the Edwards Materials Data Sheets for detailed
information.