Actuator Locking System (ALS)0 pages

Process Interlocking
Actuator Locking System (ALS)
Electrical actuator
NETHERLOCKS offers the ALS, an actuator locking
device to suit all sizes and types of actuators – linear
and rotating, electric and Pneumatic / hydraulic.
To lock an actuator the philosophy is always the
same: lock the power supply and guarantee the
position. In case of an actuator you need to control
the power source.
This could be air, oil or electric power.
A combination of NETHERLOCKS products can be
used to create a locking procedure to lock a MOV e.g.
a switch lock, a manual override lock, an air supply
lock and a position checker.
The below sample shows you how to switch-over an
electrical actuator from open to close.
Sequence:
1. Valve is open, power is OFF, open key is
released
2. Insert open key (green) into A.P.C.
3. Releasing a switch key (yellow)
4. Insert switch key into Switch Lock to
unlock the power
5. Activate the power, the switch key is no
trapped
6. Operate actuator to CLOSE,
7. Deactivate power, the switch key is no
released
8. Insert switch key into A.P.C.
9. Release close key (red), only possible in
case the actuator is FULLY close and
switch key is present.