Pfeiffer DUO 3 - Determining Degree of Aging of P3 Operating 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. Should process conditions change, you
can convert to a different operating fluid type.
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
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Vacuum pump does not reach the specified final pressure.
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Operating fluid soiled, milky or unclear
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Mineral operating fluid with thermic aging (color number > 4)
7.4.1 Determining degree of aging of P3 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.
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Wear suitable personal protective equipment when handling these media.
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Dispose of the operating fluid according to locally applicable regulations.
Scan this QR code or click here and view a document that will help you determine the de-
gree of aging of the P3 operating fluid in clean processes using a color chart (according to
DIN 51578). The document with the number PK0219 can also be obtained from the Pfeiff-
er Vacuum Download Center on request.
Prerequisites
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Vacuum pump switched off
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Vacuum pump is vented to atmospheric pressure on the suction side
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Vacuum pump cooled
Required aids
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Test tube
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Pipette with flexible hose
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Allen key, WAF 5
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Calibrated torque wrench (tightening factor ≤ 2.5)
Determining degree of aging of P3 operating fluid
1. Unscrew the filler screw.
–
Be careful with the o-ring.
2. Use the pipette to extract a sample of the operating fluid from the filling port.
3. Pour the sample into a test tube.
4. Check the sample in bright light.
Maintenance
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