Spirax Sarco AEL5 Series, Installation And Maintenance Instructions Manual

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IM-P358-26 CH Issue 1 7
Fig. 1 Manual operation
AEL51_ AEL54_ AEL55_ AEL56_
AEL52_
AEL53_
2.2 Operation
The motor rotation is transmitted through low wear and low backlash spur gears to provide
linear movement of the actuator spindle. An anti-rotation plate is fitted to prevent rotation of
the spindle during operation. Top and bottom travel switches are provided, which are activated
by a switching rod that runs in parallel with the actuator spindle.
The actuator is fitted to the valve with two mounting pillars. The disc springs transmits the
thrust movement to the valve stem. In relation to the limit switch setting the disc springs are
compressed at the valve closing position to give a defined closing force and valve shut-off.
2.3 Man ual operation
The handwheel is used to operate the actuator if the power supply has failed or during
installation work such as mounting onto a valve or setting the limit positions.
• The handwheel is permanently engaged and turns during motor operation for all the
models, with the exception of the AEL56_.
• The AEL56_ actuator has a handwheel which must be engaged for manual operation.
The ball-headed button on the cover has to be depressed to engage the handwheel.
Do not exceed the set stroke limits when operating manually.
Do not operate the handwheel using excessive force.
Failure to observe this warning may result in damage to the actuator.