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.
Pfeiffer Vacuum recommends determining the precise service life of the operating
fluid in the first operating year.
The service life may deviate from the reference value specified depending on thermic and
chemical loads, and the accumulation of suspended particles and condensate in the oper-
ating fluid.
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.
Prerequisites
● Vacuum pump switched off
● Vacuum pump vented to atmospheric pressure
● Vacuum pump has cooled so that it can be touched
● Operating fluid still warm
Required consumable
● Operating fluid
Required tools
● Ring spanner
WAF 32
● Ring spanner
WAF 27
Required aids
● Collection receptacle (> 2 l)
● Funnel (optional)
Maintenance
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