4-26
CAUTION
In operation and handling
• When automatically operating an actuator with the manual handwheel, verify
that the AUTO/MANUAL switchover pin is inserted into the pin holder, the chain
is engaged with the handwheel and the indicator is in AUTO position starting
operation.
• When disassembling and assembling, always hold the actuator in an upright
position (spring unit on top and yoke on the bottom)
• While eyebolts are used to suspend the actuator, an assembled valve should not be
suspended with the eyebolts only.
AUTO/MANUAL switchover of manual handwheel
With an actuator with the AUTO/MANUAL switchover function, switchover between
automatic operation and manual operation using the handwheel is possible. See Figure 4-23.
AUTO/MANUAL switchover can be made at any time during operation.
Figure 4-24
Operator’s instruction label
Figure 4-23
AUTO/MANUAL switchover scheme
AUTO/MANUAL
switchover pin
in AUTO position
Chain
AUTO/MANUAL
switchover pin in
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