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5. Actuator disassembly and installation
NOTE:
Avoid removing the actuator from the valve. The actuator has been calibrated at the
factory to ensure that the valve is tight. If the actuator is removed, the actuator may have
to be re-calibrated.
Vexve Oy accepts responsibility only for actuators installed by Vexve.
Refer to the separate adjustment instructions, available from the manufacturer.
WARNING:
Due to dynamic torque, the actuator must not be disconnected from the valve in
a pressurised pipeline.
Incorrect disconnection may cause serious personal injuries as well as malfunction and
damage to the equipment. Extreme caution must be exercised during disconnection.
Do not turn the disc more than 90° as this may damage the seal. Due to the valve
structure, the disc can only be turned within its original range of 0–90 degrees.
5.1 Removing the actuator
· Keep the valve and the pipeline non-pressurised whenever the gearing is not connected.
· In a butterfly valve, the gear functions as a limiter for the open and close positions. The valve itself is
not equipped with limiters. The manual gears used with butterfly valves are self-locking manual gears.
· Close the valve fully with the handwheel when the manual actuator is being disconnected.
(The valve is closed by turning the actuator handwheel clockwise.)
· Turn the actuator handwheel slightly anti-clockwise to reduce the force of the actuator and the valve.
Now the handwheel will turn easily.
· Remove the actuator bolts and pull the actuator out. Use an extractor, if required.
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