Trouble Shooting Radius Actuators
The Radius rack and pinion pneumatic actuator is manufactured of high quality
materials and is designed to give long trouble free service life. It is not uncommon
for these actuators to produce over one million complete cycles before maintenance
or replacement is required. Below is a table of possible problems and fixes that may
occur during start-up or lifecycle. Please consult with your local representative or
the factory if this guide does not rectify any problem with the actuator.
Problem Possible Cause Fix
Actuator Doesn’t
Cycle
Air piping incorrect Check Air Piping/ see IOM
Air ports blocked Detach air lines and remove debris
Air supply is too low Increase air supply at regulator
Pilot valve malfunction Check proper operation of pilot valve
/ replace
Seals are worn Rebuild with new seal kit
Actuator undersized for application Replace with larger actuator
Actuator seized during winter / outside application/
water in compressed air
Thaw actuator/ remove water /Install
air dryer
Actuator is in a corrosive environment and corroded Clean and Repair/ install breather
block assembly.*
Actuator installed improperly on valve Check for proper installation/ correct
* The Radius actuator is corrosion resistant inside and out by design. There may be
instances of environmental chemicals that attack the actuator and can cause failure.
These instances are rare so please consult the factory before assuming the failure is
do to corrosion.
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