5
Figure 1: Installation dimensions
4.1 Installation Position
Outdoor Usage:
When using the actuators in environments with high
temperature fluctuations or high humidity, we recommend
using a heating resistor as well as a higher enclosure rating
(optional accessories).
Figure 2: Installation positions
5. Function
The PSL actuators are designed as electric valve actuators. The valve is mounted onto the actuator via pedestals.
Depending on the type of valve used, mounting pedestals or a special valve mounting plate is required.
The motor torque is transmitted via a multi-stage spur gear onto a trapezoidal threaded spindle. The spindle
transmits the input torque into an axial thrust force via a stem nut. Thus, the spindle stem nut which is self-locking
carries out a linear stroke transmitted to the valve stem by a coupling piece. The actuating stroke is limited by two
adjustable limit switches in each direction that cut off the motor current.
In case of mains power loss, a manual override of the actuator is possible using the handwheel.
Electrical wiring is done to a terminal block under the actuator cover.
PSL201-204
PSL208-210
PSL214
PSL320-330
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