Smart Positioner
YT-2500 / 2550 / 2501 Series
Product manual
Ver. 1.04
19
3.3.1
Safety
Proper bracket must be made in order to adapt the positioner on the actuator yoke.
Please consider following important points when a bracket is being designed.
Positioner
’s feedback lever must be vertical to the valve stem at 50% of the valve stroke.
The connection bar of the actuator clamp for the feedback lever should be installed in
such a way that the valve stroke length coincides with the corresponding figure in
“mm”
marked on the feedback lever. Improper setting may cause poor linearity
3.3.2
Linear positioner Installation Steps
1. Assemble the positioner with the bracket made in previous step by fastening the bolts.
The bolt size is M8 x 1.25P.
Fig. 3-3: Attaching to bracket
Fig. 3-4: Attaching bracket to actuator yoke
2. Attach the positioner (or feedback sensor) with the bracket to the actuator yoke
–
DO NOT TIGHTEN THE BRACKET COMPLETELY.
3. Connect connection bar to the actuator clamp. The hole gap on the feedback lever is
6.5mm so the connection bar
’s outer diameter should be less than 6mm.
4. Connect an air-filter regulator to the actuator temporarily. Supply enough air pressure to
the actuator in order to position the valve stroke at 50% of the total stroke.
