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IQT3 manual – Section: Preparing the Drive Bush
5. Preparing the Drive Bush
5.1 Bases F05 to F07 and FA05 to
FA07
The base adaptor must be removed to
give access to the drive bush. Remove
the four capscrews and base adaptor as
shown in figure 5.1.1.
Fig. 5.1.1
Clear access to the drive bush is now
available as shown in figure 5.1.1.
Using the a 3 mm allen key, unscrew
the two capscrews retaining the drive
bush and remove the drive bush from
the actuator.
Fig. 5.1.2
5.2 Bases F10 to F16
and FA10 to FA16
Removal of the drive bush does not
require the removal of the actuator
base. Using a 3 mm allen key, unscrew
the two capscrews retaining the drive
bush.
Capscrews can be used to remove the
drive bush by screwing into the drive
bush as shown in figure 5.2.1.
Fig. 5.2.1
The range of IQT drive bushes is shown
in figure 5.2.2. Please refer to PUB002-
038 for maximum stem acceptance
details.
Fig. 5.2.2
5.3 Machining the Drive Bush
Once removed, the drive bush can
be machined to suit the valve stem.
Ensure machined position allows correct
orientation of actuator-to valve flange
and correct direction to close the valve.
5.4 Fitting the Drive Bush
Note: The drive bush can be fitted in
four possible positions, 90º apart. Fit
the drive bush into the centre column
ensuring that the stem orientation,
actuator position and direction
of operation are correct for valve
operation. Secure the drive bush with
the capscrews. For F05, FA05, F07 and
FA07 bases, refit the base adaptor and
secure with the four capscrews.
