9.3 Changing operating fluid
WARNING
Health hazard and risk of environmental damage from toxic contaminated operating fluid
Toxic process media can cause operating fluid contamination. When changing the operating fluid,
there is a health hazard due to contact with poisonous substances. Illegal disposal of toxic substan-
ces causes environmental damage.
► Wear suitable personal protective equipment when handling these media.
► Dispose of the operating fluid according to locally applicable regulations.
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.
CAUTION
Scalding from hot operating fluid
Danger of burns when draining operating fluid if it comes into contact with the skin.
► Wear protective equipment.
► Use a suitable collection receptacle.
NOTICE
Risk of damage due to the use of non-approved operating fluid
Product-specific performance data are not achieved. All liability and warranty claims against Pfeiffer
Vacuum are also excluded.
► Only use approved operating fluids.
► Only use other application-specific operating fluids after consultation with Pfeiffer Vacuum.
Maintenance frequency and service lives
Maintenance frequency and service lives are process-dependent. Chemical and thermic
loads or contamination reduce the recommended reference values.
● Determine the specific service lives during the first operating interval.
● Consult with Pfeiffer Vacuum Service if you wish to reduce the maintenance frequency.
Operating fluid type
Fundamentally, when filling, refilling, or changing operating fluid, you must always use the
operating fluid type specified on the rating plate.
Safety data sheets
You can obtain the safety data sheets for operating fluids from Pfeiffer Vacuum on request,
or from the
Pfeiffer Vacuum Download Center
The usable life of operating fluid is dependent on the area of application of the rotary vane vacuum
pumps.
Instructions for when operating fluid should be changed
● The vacuum pump does not reach the specified ultimate pressure.
● Operating fluid is perceptibly polluted, milky, or cloudy when viewed through the sight glass.
Switch-off procedure
1. Close the intake port valve, if necessary.
2. Vent the vacuum pump to atmospheric pressure to prevent operating fluid from flowing back.
Maintenance
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