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RADIUS LLC
4922 Technical Drive
Milford, Mi 48381
SERIES A
OPERATION AND
INSTRUCTION MANUAL
ADJUSTMENT OF THE ACTUATOR STOPS
Another outstanding feature of the Radius actuator is patented double travel stops that are provided
standard on all series A actuators. This system allows for the adjustment of the open and close position
without having to disassembly the actuator. Execute the following to conveniently regulate a Radius
actuator.
WARNING! Do not put your fingers close to any moving parts.
1.
Install a pneumatic control valve or connect air lines to the A and C ports.
2.
Loosen the stop nut (18).
3.
Unscrew the stud bolt, O-ring and stop nut assembly (19), (20), and (18) so that they come out of the
housing in one piece.
4.
Loosen or tighten the internal stop screw (16) according to whether more or less travel has to be given
to the actuator closing. It is very important that the two screws are adjusted equally.
5.
Once the internal stop screw is adjusted, connect the air to port A to start the actuator’s opening
process and screw the assembly formed by the stud bolt, O-ring and stop nut (19), (20), and (18) until
it touches the head of the internal stop screw (10).
6.
Tighten the stop nut (20) to prevent the stop stud (19) from loosening.
7.
Care must be taken that the two internal stop screws (16) and the internal stop studs (10) are equally
tight. This is obtained by adjusting one of them to the desired position and then tightening the other
until an increase of stress is noticed.
