2.8. Adjust stroke of actuator (rest position)
After the actuator is aligned to the operated position of the valve, the rest position of
actuator and valve can be adjusted following the next steps:
18 Operate the actuator until the valve is in exact rest position by reducing pneumatic pressure
19 Unfasten the endstop secure nut (No.6) by twisting it Tool?!?
20 Now tighten the endstop until it touches the spring ring, this is when it gets hard to turn the endstop with conventional (hand-)tooling.
21 Place the endstop secure nut again to fix the endstop in this position.