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QUI-1086
5.3 Back-pressure adapter O-ring
The back-pressure adapter connects the TD tube to the pump using an O-ring seal. It
is recommended that this O-ring is replaced every twelve months, or whenever it is
noticeably damaged.
The replacement process is as follows:
NOTES
You will require a replacement O-ring (part no.
U-COV10
), an O-ring
extraction tool (part no.
SERZ-0351
), an O-ring insertion tool (part no.
SERZ-0285
) and a pair of tweezers.
■
Use the O-ring extraction tool to hook out the O-ring (Figure 7A), taking care not
to scratch the groove in which the O-ring is seated, or to damage the white PTFE
insert behind.
■
Take the replacement O-ring and compress it slightly into an oval shape
(Figure 7B). Pinch with tweezers and insert halfway into the back-pressure
adapter.
■
Use the O-ring insertion tool to push the replacement O-ring into the groove
(Figure 7C).
■
Run the O-ring insertion tool around the inner diameter of the O-ring to ensure it
is free from distortions.
Figure 7: Changing the back-pressure adapter O-ring.
A
B
C
