▪
Do not touch or inhale the thermal breakdown products of fluorinated materials
which may be present in the pump if the pump has been heated to 260 °C and
above. Fluorinated materials are safe in normal use but can decompose into very
dangerous substances (which may include hydrofluoric acid) if they are heated to
260 °C and above. The pump may have overheated if misused or in a fire. Safety
Data Sheets for fluorinated materials used in the pump are available on request,
contact us or the supplier.
6.2 Maintenance plan
The plan shown in
Table: Maintenance plan on page 26
details the routine maintenance
operations necessary to maintain the pump in normal use. Instructions for each
operation are given in the section shown.
More frequent maintenance may be required if the pump is used to pump corrosive or
abrasive gases and vapours.
Table 9
Maintenance plan
Operation
Frequency
Refer to Section
Inspect and clean inlet
strainer
Annually
Inspect and clean the gas
ballast control (if fitted)
Annually
ballast control (if fitted) on page
Clean the external fan cover Annually
Clean the external fan cover on
Replace the tip seal and
exhaust valve
Annually or as required
Replace the tip seals on page 28
Test the motor/drive
condition
15000 hours
Replace the bearings
35000 hours
Contact us
6.3 Inspect and clean the inlet strainer
Whenever disconnecting the pump from the vacuum system:
▪
Remove any debris trapped by the inlet strainer (in the inlet port).
▪
Inspect the inlet strainer and if necessary, clean with a cleaning solution suitable
for the substances pumped. Refit the inlet strainer before reconnecting the pump
to the vacuum system.
1.
Refer to
Figure: Inlet strainer assembly on page 27
. Disconnect the vacuum system
from the pump inlet port (item 3) and remove the centring ring and strainer
assembly (item 1) and the O
‑
ring (item 2). Inspect the centring ring and the O
‑
ring.
If clean, continue at Step 5. If not clean, continue at Step 2.
2.
Remove the O
‑
ring (item 2) from the centring ring and strainer assembly (item 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.
Page 26
A73101880_F - Maintenance