Pfeiffer Vacuum DUO 255, Руководство по эксплуатации

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Maintenance
21
Checklist for inspec-
tion, maintenance
and overhaul
Certain maintenance and overhaul work should only be performed by Pfeiffer Vacuum
Service (PV). Pfeiffer Vacuum will be released from all warranty and liability claims if the
required, below listed, intervals are exceeded or maintenance or overhaul procedures
are not performed properly. This also applies if replacement parts other than Pfeiffer Vac-
uum OEM replacement parts are used.
7.2 Changing the operating fluid
The changing interval for the operating fluid depends on the pump applications, but
should be carried out once a year.
 The level of deterioration of operating fluid P3 can be determined for clean processes
with the colour scale (in accordance with DIN 51578); supplementary sheet PK 0219
BN on request or at
www.pfeiffer-vacuum.com .
 Suck off operating fluid from the pump through the operating fluid filler opening.
 Fill the specimen in a test tube or some similar vessel and test by holding against the
light.
 Where discolouration is red brown (equivalent to 5 on the scale) change operating flu-
id at the latest.
 Switch off the pump.
 Unscrew operating fluid filler screw 327.
 Unscrew operating fluid drain screw 328.
Activity K/I/
W/R
1
1. K: Checking, I: Inspection, W: Maintenance, R: Overhaul
daily as required;
at least
annually
as required;
at least every
2 years as required;
at least every
4 years
Check operating fluid level K X
Visual inspection (leak-tightness/oil leaks) K X
Check filter insert of external oil mist filter (if
existent) K X
Change operating fluid I X
Disassemble casing, sight glass and pump-
ing system and clean casing outside (with-
out cleaning agent) I X
Clean gas ballast valve and silencer I X
Clean the motor fan cap I X
Disassemble the pump, clean and exchange
seals and wearing parts:
 Radial shaft seal ring
 Coupling half at motor side
 Hydraulic valve
 Exhaust valve tongue
 Valve flap of the gas ballast valve
 Vane springs
W X (PV)
Carry out work in accordance the mainte-
nance and additionally:
 Change vanes
 Change valves, springs and sight glass
 Change silencer nozzle
 Check coupling and exchange if neces-
sary
R X (PV)
Depending on the process, the required replacement intervals for the operating fluid and the intervals for
inspection, maintenance and overhaul may be shorter than the guide values specified in the table. Consult
Pfeiffer Vacuum Service, if necessary.
Depending on the applications, Pfeiffer Vacuum recommends determining the ex-
act service life of the operating fluid during the first year of operation.
The replacement interval may vary from the guide value specified by Pfeiffer Vacuum
depending on the thermal and chemical loads, and the accumulation of suspended par-
ticles and condensation in the operating fluid.