Eclipse Rotary Actuator Instruction Manual 904-7/24/06
13
Note:
The buttery valve rotation direction is viewed
from the shaft end connected to the actuator,
the same view as facing the actuator’s keypad.
The slot at the end of the buttery valve shaft is
parallel to the shutter. When the shaft is rotated
to align the slot to the pipe direction, the valve is
at maximum ow. Eclipse BVs with the beveled
shutter option have a 75-degree stroke. The
minimum positions of these valves physically stop
at about a 15-degree angle when the buttery
shaft is turned fully counter-clockwise. Therefore
the PRA must have its low position set to about
15 to prevent trying to rotate against the physical
stop. Final ne-tuning adjustments to the
minimum position can be made after mounting
the PRA to the BV.
2. If the stroke or rotation comparison does
not match or if you suspect the PRA has
been set differently from the part number,
then provide temporary power to the PRA
before mounting. Refer to the “Power
Supply” heading on page 16. Then refer to
Section 3 (“Parameter Selection,” page 21)
and adjust the settings as follows:
a. Refer to “Clockwise or
Counterclockwise Rotation Select”
to set the rotation direction to
match the BV.
b. Refer to “Low Fire Stop (LF)” to
set the minimum position. Also
reference the note for “Control
Signal Loss (LO)”.
c. Refer to “High Fire Stop (HF)” to set
the maximum position.
d. Check your settings by putting
the PRA in the manual mode (see
Section 3, “Parameter Selection” and
“Manual Position Select”). Drive
the PRA up to the full open position
and note the display and shaft. Then
drive back down to the full closed
position and note the display and
shaft.
Butterfly Valve
Shutter
Shaft
Slot is in
line with
the shutter
Bolt is
perpendicular
to shutter
Coupling
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