Waters Xevo TQD Operator's, Overview And Maintenance Manual page 179

6. Holding the oil demister element slightly elevated to prevent the loss of
the spring, remove the exhaust flange from the oil demister element.
7. Remove the spring from the oil demister element.
Warning:
irritant oil, or biohazardous and/or toxic materials. Ensure
that it is correctly disposed of according to local
environmental regulations.
8. Dispose of the oil demister element in accordance with local
environmental regulations.
The oil demister element can be contaminated with
Replacing the roughing pump's oil demister element 4-103
TP02692