Parts Replacement Azbil Corporation
6-8 VDC, VAC, VST, VAA - Diaphragm Control Valve
Calibration
This actuator does not need calibration.
When connecting the valve stem of the valve body with an actuator's rod with stem
connector, due adjustment should be made to set the valve plug on the seat ring.
Then screws on actuator's scale plate are loosened, and the stroke and index
matched to properly position the scale plate.
CAUTION
When automatically operating an actuator with manual handwheel, verify that the
AUTO/MANUAL switchover pin is inserted into the pin holder, to chain is engaged on
the handwheel and the indicator is in AUTO position before starting operation.
When disassembling and assembling, always hold the actuator in an upright position
(spring unit on top and yoke on bottom)
While eyebolts are used to suspend the actuator, the assembled valve should not be
suspended by eyebolts.
6-6-2 : AUTO/MANUAL Switchover of Manual Handwheel
Refer to Figure 6-8 for details of AUTO/MANUAL switchover of handwheel.
With an actuator with AUTO/MANUAL switchover functions, switchover between
automatic operation and manual operation by handwheel are available.
AUTO/MANUAL switchover can be made at any optional moment during operation.
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