IM-P713-01 CTLS Issue 1
52
AEL7 Series Electric actuator
6.7 Adjustment of Actuator Stroke (8 kN+)
The physical stroke of the 8 kN+ AEL7 Series actuator can be adjusted precisely to meet the valve stroke
requirements, for example when the actuator thrust could damage the valve. This is controlled by Stroke
Dependent Switch S3. Increasing or decreasing the stroke will impact the resolution of the potentiometer.
Ensuring that potentiometer resolution is maintained is controlled by the Stroke Arm and Stroke Slider
(Fig. 25).
Caution
Before commencement of any work to inspect, install, commission, remove or modify the
actuator stroke, please read to Section 1 "Safety Information", Section 4.1 "Electrical
Connection Safety Considerations" and Section 6.1 "Commissioning Safety Information".
Warning
Do not use the hand wheel or hand crank when either electrical power supply of control
signal are applied. The actuator may respond to manual interaction resulting in muscular-
skeletal damage to fingers.
Caution
It is possible to damage the force dependent switches by applying excessive load by use of
the hand wheel or hand crank.
With the actuator spindle in the fully extended position, the power supply safely isolated and the actuator
cover removed:
-
Couple the actuator to the valve in line with the correct mounting flange and linkage kit (Section 3 and
TI-P713-02)
-
Ensure the correct thread engagement is observed (Tables 3 to 5)
-
The Stroke Arm and Potentiometer Lever should be parallel (Fig. 28)
-
Loosen the Stroke Slider lock nut (10mm A/F) and carefully move the slider to the required stroke as
indicated on the arm (Fig. 29)
-
Tighten the Stroke Slider Lock nut
-
Drive the actuator through the full stroke to check the stroke limits are correct
Note: when adjusting the stroke of the actuator, consider the setting of Stroke Dependent Switch S3. S3
must be adjusted to match or exceed the required stroke in order not to restrict valve travel.
Note: the stroke arm must not come in contact with the actuator base under any circumstance
Caution
The stroke arm must not come in contact with the actuator base under any circumstance.
This can cause damage to and malfunctioning of the actuator.
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