IQ3 manual – Section: Cable Connections 17
6.7 IQL & IQML Adjusting Linear
Stroke
With the actuator securely fitted to
the valve, but with the linear drive
disconnected ensure valve is at its fully
closed (down) position.
Remove cover tube from actuator
handwheel, locate the down stop
adjustment on the linear drive unit and
with two spanners loosen the lock nut,
run the lock nut and tubular down
stop anti-clock wise to the end of the
thread.
Fig. 6.7.1
Turn the actuator handwheel
clockwise, the linear drive will move
down towards the valve spindle and
couple the linear drive to valve spindle.
Turn the tubular down stop clockwise
into the actuator until it comes to a
mechanical stop. If the valve must close
into its seat by TORQUE ACTION then
back off (anticlockwise) the down stop
by one third of one turn (equivalent to
1 mm). Run the lock nut down onto
the tubular down stop and tighten
with two spanners. There is no UP
STOP (open) on the linear drive unit,
the mechanical stop in the valve will
give this position. Refit the cover tube
onto the handwheel ensuring the
O-ring is fitted.
The linear drive unit is pre-packed with
extreme pressure multi-purpose grease
MULTIS MS2, use this or an equivalent
high temperature grease.
A grease nipple is situated in the base
of the actuator to enable lubrication of
the lead screw.
Periodically, depending on usage and
temperature, apply two pumps of the
grease gun.
7. Cable Connections
7.1 Terminal Block Layout
Fig. 7.1.1 Terminal numbers refer to connections as shown on the actuator circuit diagram
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