Action
described in document
Inspection
OI
Maintenance
level 1
OI
Maintenance
level 2
MI
Maintenance
level 3
MI
Required mate-
rial
Interval
daily
≤ yearly
≤ 2 years
≤ 4 years
Maintenance level 3 – overhaul
Dismantle and clean pump, replace
seals and all wearing parts:
● Vane
● Valves, springs, and sight glass
■
Overhaul kit
OI:
operating instructions,
MI:
maintenance instructions
Depending on the operating conditions, the required maintenance intervals can be shorter than the reference values speci-
fied in the table. Please consult Pfeiffer Vacuum if necessary.
You can find the corresponding spare parts in the chapter "Spare parts packages"
.
Tbl. 10:
Maintenance intervals
7.4 Changing the operating fluid
WARNING
Danger of poisoning from toxic vapors
Igniting and heating synthetic operating fluid generates toxic vapors. Danger of poisoning if inhaled.
► Observe the application instructions and precautions.
► Do not allow tobacco products to come into contact with the operating fluid.
Determine the exact usable life of the operating fluid in the first year of opera-
tion – recommendation by Pfeiffer Vacuum.
The usable life may deviate from the reference value specified depending on ther-
mic and chemical loads, and the accumulation of suspended particles and conden-
sate in the operating fluid.
The usable life of operating fluid is dependent on the area of application of the pump.
Instructions for when operating fluid should be changed
● Pump does not reach the specified ultimate pressure.
● Operating fluid is perceptibly polluted, milky, or cloudy when viewed through the sight glass.
● It is possible to detect thermal aging of the operating fluid from its color identification number (ap-
plies to mineral oils only).
Safety data sheets
You can obtain the safety data sheets for operating fluid from Pfeiffer Vacuum on
request, or from the
Pfeiffer Vacuum Download Center
.
7.4.1 Degree of aging of P3 operating fluid
You can determine the degree of aging of P3 operating fluid in clean processes using the color chart (in
accordance with DIN 51578) (supplementary sheet PK 0219 BN on request or from the
).
Determining the degree of aging
1. Shut down the vacuum pump and allow it to cool if necessary.
2. Vent the pump to atmospheric pressure via the intake side.
3. Unscrew the operating fluid filler screw.
4. Extract an operating fluid sample from the pump via the operating fluid filling port.
5. Pour the sample into a test tube or similar vessel, and check it in bright light.
Maintenance
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