10
YT-3400/3450 series
3.2.1
Installation Steps
1. 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 parallel to the ground at 50% of the valve stroke.
Feedback lever connection with the pin of the actuator clamp 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 and
may create unnecessary hunting during the operation.
2. Assemble the positioner with the bracket made in previous
step by fastening the bolts. Please refer to the backside of
the positioner for size of the bolts. The standard bolt size is
M8 x 1.25P. Please contact Young Tech Co., Ltd for other
bolt sizes.
3. Attach the positioner with bracket to the actuator yoke –
DO NOT TIGHTEN
POSITIONER COMPLETELY.
4. Connect positioner’s feedback lever to the actuator
clamp. The hole gap on the feedback lever is
6.5mm. The connection pin’s outer diameter
should be less than 6.3mm.
5. Connect supply pressure to the actuator temporarily. Supply enough supply pressure to
the actuator in order to position the actuator clamp at 50% of the total valve stroke.
6. Insert connection pin into the feedback lever. The pin should be inserted when the
actuator clamp is at 50% of the total valve stroke.
Proper way to connect feedback lever, connection pin, and lever spring
