GEA VARIVENT Flange User manual

Assembly Instructions
VARIVENT® Flange
1 Removal
• Slacken the screws in the flange connection and remove.
GEA Tuchenhagen recommends using a scriber to remove the O-ring.
hen removing the O-ring with the scriber, the scriber can slip off. There is a
danger of injury and the O-ring groove can be damaged!
• Pick the O-ring from the groove using the scriber.
• Clean the O-ring groove.
2 Fitting
hen greasing the O-ring observe the safety data sheets issued by the
lubricant manufacturer.
• Grease the O-ring evenly and very thinly.
GEA Tuchenhagen recommends the lubricant type PARALIQ GTE 703 (order no.: 413-064).
It is easy to stretch the O-ring when fitting as its inner diameter is approx. 10%
smaller than the diameter of the groove.
To prevent the O-ring coming off before the flange connection is finally
assembled, the ring must not be twisted and no air must penetrate behind it
after fitting. A twisted O-ring can turn itself out of the groove and/or any air
entrapped behind it can expand and thus cause the O-ring to come off.
To allow for venting after fitting the O-ring, TUCHENHAGEN recommends using
e.g. a piece of thread.

• Apply a dot of grease on the flange.
• Place the piece of thread radially on the groove
and in the dot of grease.
• Use both thumbs to press the O-ring into the
groove on the opposite side.
• Beginning at the starting point, use your thumb to
push the O-ring into the groove in the direction of
the piece of thread. Make sure the ring is not
twisted.
• Press the O-ring completely into the groove.
• Pull out the thread.
• Finally smooth out the O-ring.