3. Check level.
4. Screw the drain screw in completely.
– Be careful with the O-ring.
– Tightening torque:
3.0 Nm
7.4.3 Rinse and clean 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.
Required tools
● Allen key,
WAF 5
● Allen key,
WAF 6
● Allen key,
WAF 8
● Calibrated torque wrench (tightening factor ≤ 2.5)
Prerequisites
● Operating fluid filled
Change operating fluid for cleaning
1. Operate vacuum pump with gas ballast open, until it is warm.
2. Perform 2 operating fluid changes.
3. Check pollution level and repeat process if necessary.
4. If accessories are installed, replace corresponding filter elements.
1
1
2
Fig. 17:
Remove rotary vane pump cap
1 Stand
4
Allen head screws
2 Pumping system
5
Cap
3 O-ring
6
Drain screw
Remove and clean cap
1. Drain operating fluid.
2. Unscrew 4 Allen head screws from cap.
3. Remove cap from rotary vane pump stand.
– Take care with o-ring between cap and stand.
4. Collect any leaking operating fluid.
5. Dispose of operating fluid according to applicable regulations.
Clean pumping system and cap
1. Clean pumping system from outside, without using cleaning agents.
2. Clean cap from inside, without using cleaning agents.
3. Screw operating fluid drain screw into drain hole in cap.
– Be careful with o-ring.
– Tightening torque:
3.0 Nm
Maintenance
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