Filling fresh operating fluid
1. Screw in the drain screw.
– Be careful with the O-ring.
2. Fill new operating fluid.
3. Check level.
4. Screw in the filler screw.
– Be careful with the O-ring.
8.3.3 Rinsing and cleaning the rotary vane vacuum pump
Cleaning by changing the operating fluid
Pfeiffer Vacuum recommends, in cases of heavy contamination with process residues,
cleaning the inside of the vacuum pump with several operating fluid changes.
Prerequisites
● Fresh operating fluid filled
Required aids
● Collection receptacle (> 2 l)
Change operating fluid for cleaning
1. Operate the vacuum pump until it is warm.
2. Perform an operating fluid change.
3. Check the pollution level and repeat the changing of the operating fluid if necessary.
4. In case of highly contaminated operating fluid, replace the exhaust filter.
8.4 Change exhaust filters in the operating fluid separator
WARNING
Health hazard through poisoning from toxic contaminated components or devices
Toxic process media result in contamination of devices or parts of them. During maintenance work,
there is a risk to health from contact with these poisonous substances. Illegal disposal of toxic sub-
stances causes environmental damage.
► Take suitable safety precautions and prevent health hazards or environmental pollution by toxic
process media.
► Decontaminate affected parts before carrying out maintenance work.
► Wear protective equipment.
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.
Change the exhaust filter annually
Pfeiffer Vacuum recommends replacing the exhaust filter in the operating fluid separator
annually, depending on the work process and the contamination incurred during the proc-
ess.
Indications for saturation of the exhaust filter:
● higher current consumption of the motor
● increased emission of operating fluid mist at the gas outlet
● increased pressure in the operating fluid separator (pressure gauge indicator in the red area).
Continuous monitoring of the filter resistance
► To continually monitor the filter resistance, use a manometer from
instead of the filler screw .
Maintenance
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