rotork YT-2700, Product Manual

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Smart Positioner
YT-2700 Product Manual
Ver. 1.18
16
Before proceeding with the installation, ensure following components are available.
➢
Positioner
➢
Feedback lever and lever spring
➢
M5 Square nut and wrench head bolt (fastening feedback lever to a main shaft)
➢
Bracket, bolts and washers for positioner or sensor
– not supplied with the positioner
➢
Connection bar
– not supplied with the positioner
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 M6 x 1P.
Fig. 3-4: A bracket example for a right yoke Fig. 3-5: A bracket example for a left yoke