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RADIUS LLC
4922 Technical Drive
Milford, Mi 48381
SERIES A
OPERATION AND
INSTRUCTION MANUAL
The necessary steps for the proper installation of an actuator onto a valve are the following:
a.
Determine the valve’s type of operation.
b.
Determine the quadrant and the direction in which the actuator will be installed (i.e., perpendicular or
parallel to the fluid line.)
c.
The connection of the assembly, support/actuator/valve, must be done in the following manner:
1.
Rotate the actuator shaft to the desired position.
2.
Install the valve support. At this time, the bolts must not be completely tightened.
3.
Place the coupling on the valve shaft, making sure that it is correctly placed.
4.
Set the actuator on the valve, making sure that the coupling is correctly inserted in the actuator
shaft.
5.
Secure the support to the valve using the proper bolts and tighten all the bolts.
6.
At this point, check that the actuator and the valve are in the desired position.
7.
In the event that it is not correctly positioned, remove the actuator and repeat all the steps.
WARNING: NEVER REMOVE A PRESSURIZED ACTUATOR!
FEATURES AND OPERATING PRINCIPLES
1.
Basic Actuator
The RADIUS actuator shaft rotates a full 90° (some models can be ordered with a 180° rotation angle).
The opening rotation is achieved, both in the double and single action models, by supplying air pressure
into the piston chambers. This thereby forces them to move in opposite directions and separating them one
from the other, resulting in a counterclockwise rotation of the shaft. At the end of the travel the actuator
will be in the open position.
In the double action actuators, the closing movement is obtained by supplying air pressure to the chambers
in both covers, forcing the pistons to move in opposite directions. This causes the pistons to draw nearer to
each other. Consequently, the shaft rotates clockwise obtaining the closed position at the end of the travel.
