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Instruction Manual
June 2010
ARM AT MID-TRAVEL POSITION
ACTUATOR STEM TRAVEL INDEXES
NOTE:
1
ALIGN INDEX MARKS AS SHOWN FOR MID-TRAVEL POSITION.
A2452-3 / IL
Figure 16. Rotary Shaft Arm 0-Degree and Case Index Marks,
Location and Alignment
0-degree index marks on the rotary shaft arm align
with the case index marks as shown in figure 6.
Then, position the travel pin (key 60) so that it is
perpendicular to the arm and aligns with the
appropriate total actuator travel index mark on the
rotary shaft arm. Tighten the locking nut (key 62).
Valve stem travels less than 29 mm
(1.125 inches) require that the travel
pin be set at the 1-1/8 inches travel
index mark on the rotary shaft arm.
2. Loosen the nozzle locknut and turn the nozzle
clockwise to its lowest position. Then screw the
nozzle out (counterclockwise) approximately 4 turns
and tighten the locknut.
For proper operation, the flapper must
approach the nozzle squarely. Inspect
the nozzle/flapper alignment. Be sure
the flapper is not loose, bent, or
twisted.
3. Remove any loading pressure and/or disengage
any handwheel used to position the actuator.
Connect the necessary tubing from the valve
positioner output to the actuator pressure
connection.
4. Connect the input to the valve positioner and set
the input signal value at midrange. For example, for
a 3582 valve positioner with a 0.2 to 1.0 bar (3 to 15
psig) input signal range, set the input signal at 0.6
bar (9 psig). Then apply supply pressure to the valve
positioner.
CASE INDEX MARKS
0-DEGREE
ARM INDEX
MARKS
1
Note
Note
3582, 582i, and 3583
5. Move the flapper assembly to zero on the beam
scale. The 0-degree index marks on the rotary shaft
arm should align with the case index marks as
shown in figure 16. If not, loosen the follower
assembly screw locknut and adjust the follower
assembly screw until the 0-degree index marks on
the rotary shaft arm align with the case index marks.
Tighten the locknut.
6. Move the flapper assembly to position 10 on the
direct-acting side of the beam scale. The 0-degree
index marks on the rotary shaft arm should align with
the case index marks as shown in figure 16. If not,
loosen the bellows assembly locknut and adjust the
bellows pivot pin until the 0-degree index marks on
the rotary shaft arm align with the case index marks.
Tighten the locknut.
7. Move the flapper assembly to the left to position
10 on the reverse-acting side of the beam. The
0-degree index marks on the rotary shaft arm should
align with the case index marks as shown in figure
16. If not, loosen the beam pivot pin locknut and
adjust the beam pivot pin until the 0-degree index
marks on the rotary shaft arm align with the case
index marks. Tighten the locknut.
8. Repeat steps 5, 6, and 7 to optimize alignment.
Recheck to make sure the flapper approaches the
nozzle squarely. If it does not, adjust the nozzle and
re-level the beam. After alignment, the valve
positioner is ready for calibration.
Calibration
WARNING
During calibration the valve may move.
To avoid personal injury or property
damage caused by the release of
pressure or process fluid, provide
some temporary means of control for
the process.
1. Shut off the supply pressure to the valve
positioner. Connect or reconnect the necessary
tubing from the valve positioner output to the
actuator supply connection. Connect the input to the
valve positioner and set the input signal value at
midrange.
2. Move the flapper assembly to approximately
position 6 in the proper operating quadrant of the
beam (direct or reverse acting), and apply supply
pressure to the valve positioner. The 0 degree index
marks on the rotary shaft arm should align with the
case index marks as shown in figure 16 and the
25
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