Smart Positioner
YT-3700 / 3750
Product Manual
Ver. 1.03
28
Fig. 3-11: Actuator stem Height
Fig. 3-12: Exploded Brackets
3.4.3
Rotary positioner Installation Steps
1. Please check the actuator
’s stem height and adjust the brackets by referring to the above bracket
table.
2. Attached the brackets onto the actuator. It is recommended to use spring washer so the bolts will
not be loosen from vibration.
3. Set rotation position of the actuator stem at 0%. For single acting actuator, it is easy to check 0%
point by supplying no pressure to the actuator. For double acting actuator, check actuator
stem’s rotation direction – clockwise or counter-clockwise - by supplying pressure to the actuator.
4. Attach the positioner to the bracket. Setting alignment of center of main shaft of the positioner
and center of the actuator
’s stem is very important. Poor alignment of the main shaft and the
actuator
’s stem decreases the positioner’s durability due to unnecessary forces on the main shaft.
Fig. 3-13: Main shaft center alignment
5. Tighten the positioner and the bracket with bolts
after checking the positioner
’s position.
